Cited by 84Proteins in Food SystemsCynara cardunculus studiesEnzyme Production and Characterization

Advances in the role of a plant coagulant ( Cynara cardunculus ) in vitro and during ripening of cheeses from several milk species

Open access
Sousa, Maria Jos�, Malcata, F. Xavier·2002·Le Lait

Abstract

Extracts from dried flowers of Cynara cardunculus have been employed successfully for many centuries in Portugal and some regions of Spain for the manufacture of traditional cheeses.

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Registry

Crossref · 10.1051/lait:2002001

Cites

57 of 57 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

28 of 126 cited sources checked · 20 supported · 1 flagged · accuracy not yet measured

  • Premisecitation

    The rates of breakdown of β-and αs-caseins by extracts of C. cardunculus are not significantly affected by storage time.

    “The rates of breakdown of β-and α scaseins by extracts of C. cardunculus were not significantly affected by storage time; however, lyophilised extracts reconstituted in citrate buffer were significantly less proteolytic [60].”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [60] 60. Tavaria F.K., Sousa M.J., Malcata F.X., Storage and lyophilization effects of extracts of Cynara cardunculus on the degradation of ovine and caprine caseins, Food Chem. 72 (2001) 79-88. source

      The Results and discussion section reports that storage time was a statistically significant factor (P<0.05) in the degradation of both β- and αs-caseins. It notes some nonsignificant comparisons between particular storage times, but these do not support the claim that storage time had no significant effect overall. Page numbers were not available in our copy. (LLM, conf=0.91)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    The lyophilisation process prevents proteolytic breakdown of the milk caseins when the extracts are reconstituted in citrate.

    “The lyophilisation process seemed to retard loss of the clotting activity throughout storage, and to prevent proteolytic breakdown of the milk caseins when the extracts were reconstituted in citrate.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [60] 60. Tavaria F.K., Sousa M.J., Malcata F.X., Storage and lyophilization effects of extracts of Cynara cardunculus on the degradation of ovine and caprine caseins, Food Chem. 72 (2001) 79-88. source
  • Premisecitation

    Storage at 4 oC decreases significantly the clotting activity of the extracts to a greater extent in fresh than in lyophilised form.

    “Tavaria et al. [60] reported that storage at 4 ºC decreased significantly the clotting activity of the extracts to a greater extent in fresh than in lyophilised form.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [60] 60. Tavaria F.K., Sousa M.J., Malcata F.X., Storage and lyophilization effects of extracts of Cynara cardunculus on the degradation of ovine and caprine caseins, Food Chem. 72 (2001) 79-88. source
  • Premisecitation

    NaCl concentrations above 5% decrease proteolysis of caseins.

    “but NaCl concentrations above 5% decreased proteolysis of caseins [48,55]”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [48] 48. Sousa M.J.C.F., Plant rennet substitute from flowers of Cynara cardunculus. MSc thesis, Na- tional University of Ireland, Cork, Ireland, 1993.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [55] 55. Sousa M.J., Malcata F.X., Proteolysis of ovine and caprine caseins in solution by enzymatic ex- tracts of Cynara cardunculus, Enzyme Microb. Technol. 22 (1998) 305-314. source

      The Experimental data section reports reduced proteolysis of ovine and caprine caseins in the presence of 5% NaCl. It also reports an earlier finding of increasing inhibition of bovine β-casein proteolysis as NaCl rose up to 20%, but this paper did not test ovine or caprine caseins above 5%. The claim’s general threshold of ‘above 5%’ is therefore broader than its own results support. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • Premisecitation

    Lyophilised extracts reconstituted in citrate buffer are significantly less proteolytic.

    “however, lyophilised extracts reconstituted in citrate buffer were significantly less proteolytic [60].”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [60] 60. Tavaria F.K., Sousa M.J., Malcata F.X., Storage and lyophilization effects of extracts of Cynara cardunculus on the degradation of ovine and caprine caseins, Food Chem. 72 (2001) 79-88. source
  • May combine two claims. 59
  • Classified as probably not a substantial claim. 13
  • May combine two claims.

    Premisecitation

    A few problems were encountered in experiments on French and Italian cheeses; these included slightly more acid and bitter flavours and softer curd, with concomitant increased tendencies for loss of shape.

    “However, a few problems were encountered; these included slightly more acid and bitter flavours and softer curd, with concomitant increased tendencies for loss of shape [2,3].”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [2] 2. Barbosa M., Valles E., Vassal L., Mocquot G., L'utilisation d'extrait de Cynara cardunculus L. comme agent coagulant en fabrication de fromages à pâte molle et à pâte cuite, Lait 56 (1976) 1-17. source

      The organoleptic findings (section 5, page unavailable) report that Cynara-made cheeses were softer and became deformed during ripening. The paper also reports bitterness in Camembert and Gruyère, describing it as pronounced rather than slight. These passages do not report a more acidic flavour or experiments on Italian cheeses. (LLM, conf=0.89)

      Experimental — accuracy not yet measured
    • cites [3] 3. Barbosa M., Corradini C., Battistoni B., Cheesemaking experiments carried out on some Italian cheeses with vegetable rennet from cardo (Cynara cardunculus L.), Sci. Tec. Latt.- Casearia 32 (1981) 203-221.
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    NaCl has no significant effect on the rate of enzyme extraction.

    “Salt may be added to the initial aqueous infusion, although it has been shown that NaCl has no significant effect on the rate of enzyme extraction [50,62].”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [50] 50. Sousa M.J., Malcata F.X., Effects of processing conditions on the caseinolytic activity of pro- teinases from Cynara cardunculus L., Food Sci. Technol. Int. 2 (1996) 255-263.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [62] 62. Tsouli J., Étude comparée de l'activité enzymatique de trois varietés d'artichauts du genre Cynara cardunculus L. sur la coagulation du lait, Lait 44 (1974) 415-421. source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Those two enzymes appear chiefly in the female part of the flowers of C. cardunculus, i.e. in the upper portion (where the ratio of concentrations of cardosin A to cardosin B is also higher); in the lower portion, only cardosin B is present.

    “More recent studies [21,63,64] have indicated that those two enzymes appear chiefly in the female part of the flowers of C. cardunculus, i.e. in the upper portion (where the ratio of concentrations of cardosin A to cardosin B is also higher); in the lower portion, only cardosin B is present [9].”
    Quote in the paperNot a substantial claim1 of 4 sources checked
    • cites [21] 21. Faro C.J., Veríssimo P., Lin Y., Tang J., Pires E.V., in: Takahashi K. (Ed.), Aspartic protein- ases: Structure, Function, Biology and Biomed- ical Implications, Plenum Press, New York, USA, 1995, pp. 373-377.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [63] 63. Veríssimo P., Esteves C., Faro C., Pires E., The vegetable rennet of Cynara cardunculus L. con- tains two proteinases with chymosin and pepsin- like specificities, Biotechnol. Lett. 17 (1995) 621-626.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [64] 64. Veríssimo P., Faro C., Moir A.J., Lin Y., Tang J., Pires E., Purification, characterization and par- tial amino acid sequencing of two new aspartic proteinases from fresh flowers of Cynara cardunculus L., Eur. J. Biochem. 235 (1996) 762-768. source

      Split into 2 atoms — 0 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured
    • cites [9] 9. Castanheira P.M.D., Distribuição diferencial das cardosinas A e B ao longo do pistilo de Cynara cardunculus L., MSc thesis, Universidade de Coimbra, Coimbra, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    These proteinases share pH optima in the acid range, inhibition by pepstatin and preferential cleavage of peptide bonds between hydrophobic residues.

    “These proteinases share pH optima in the acid range, inhibition by pepstatin and preferential cleavage of peptide bonds between hydrophobic residues (as happens with other aspartic proteinases) [64].”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [64] 64. Veríssimo P., Faro C., Moir A.J., Lin Y., Tang J., Pires E., Purification, characterization and par- tial amino acid sequencing of two new aspartic proteinases from fresh flowers of Cynara cardunculus L., Eur. J. Biochem. 235 (1996) 762-768. source
  • May combine two claims.

    Premisecitation

    The bond Tyr95-Leu96 is also cleaved in bovine αs2-casein, whereas the bonds Ser9-Ser10 and Tyr179-Leu180 are cleaved in caprine caseinate as well.

    “The bond Tyr 95 -Leu 96 was also cleaved in bovine α s2 -casein [32], whereas the bonds Ser 9 -Ser 10 and Tyr 179 -Leu 180 were cleaved in caprine caseinate as well [55].”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites [32] 32. Macedo I.Q., Faro C.J., Pires E.V., Caseinolytic specificity of cardosin, an aspartic protease from the cardoon Cynara cardunculus L.: action on bovine α s -and β-casein and comparison with chymosin, J. Agric. Food Chem. 44 (1996) 42-47. source
    • cites [55] 55. Sousa M.J., Malcata F.X., Proteolysis of ovine and caprine caseins in solution by enzymatic ex- tracts of Cynara cardunculus, Enzyme Microb. Technol. 22 (1998) 305-314. source
  • May combine two claims.

    Premisecitation

    The most susceptible bond on bovine β-casein is Leu192-Tyr193, although proteinases from C. cardunculus were reported to cleave Leu127-Thr128, Leu165-Ser166 and every single peptide bond of Ala189-Tyr193 in bovine β-casein as well.

    “The most susceptible bond on bovine β-casein is Leu 192 -Tyr 193 , [32,48], although proteinases from C. cardunculus were reported to cleave Leu 127 -Thr 128 , Leu 165 -Ser 166 and every single peptide bond of Ala 189 -Tyr 193 (i.e.Ala 189 -Phe 190 , Phe 190 -Leu 191 , Leu 191 -Leu 192 and Leu 192 -Tyr 193 ) in bovine β-casein as well [32] (Fig. 1b).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [32] 32. Macedo I.Q., Faro C.J., Pires E.V., Caseinolytic specificity of cardosin, an aspartic protease from the cardoon Cynara cardunculus L.: action on bovine α s -and β-casein and comparison with chymosin, J. Agric. Food Chem. 44 (1996) 42-47. source
    • cites [48] 48. Sousa M.J.C.F., Plant rennet substitute from flowers of Cynara cardunculus. MSc thesis, Na- tional University of Ireland, Cork, Ireland, 1993.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    In ovine and caprine caseinates, β-caseins are cleaved at both Leu127-Thr128 and Leu190-Tyr191, but in caprine caseinate the bonds Glu100-Thr101 and Leu136-Pro137 are also broken down.

    “In ovine and caprine caseinates, β-caseins (i.e.β 1 -and β 2 -casein, which are two variants that differ in their level of phosphorylation, 6 and 5, respectively) are cleaved at both Leu 127 -Thr 128 and Leu 190 -Tyr 191 , but in caprine caseinate the bonds Glu 100 -Thr 101 and Leu 136 -Pro 137 are also broken down [55] (Fig. 1b).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [55] 55. Sousa M.J., Malcata F.X., Proteolysis of ovine and caprine caseins in solution by enzymatic ex- tracts of Cynara cardunculus, Enzyme Microb. Technol. 22 (1998) 305-314. source

      The Experimental data section reports Leu127–Thr128 and Leu190–Tyr191 cleavage in ovine β-casein, and Glu100–Thr101 and Leu127–Thr128 cleavage in caprine β-casein. Its caprine-site list instead gives Pro136–Leu137 and Leu192–Tyr193, so it does not fully support the claimed caprine bond identities. No page number is available in our copy. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Premisecitation

    The major cleavage site of bovine and ovine κ-casein is Phe105-Met106, whereas caprine κ-casein is preferentially cleaved at Lys116-Thr117.

    “The major cleavage site of bovine [31] and ovine κ-casein is Phe 105 -Met 106 , whereas caprine κ-casein is preferentially cleaved at Lys 116 -Thr 117 [55] (Fig. 1a).”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites [31] 31. Macedo I.Q., Faro C.J., Pires E.V., Specificity and kinetics of the milk-clotting enzyme from Cardoon (Cynara cardunculus L.) toward bo- vine κ-casein, J. Agric. Food Chem. 41 (1993) 1537-1540. source
    • cites [55] 55. Sousa M.J., Malcata F.X., Proteolysis of ovine and caprine caseins in solution by enzymatic ex- tracts of Cynara cardunculus, Enzyme Microb. Technol. 22 (1998) 305-314. source
  • May combine two claims.

    Interpretationcitation

    Comparison of results suggests that the bonds in pure caseins (or in sodium caseinate) most susceptible to cardosins A and B are Leu190-Tyr191 and Leu127-Thr128 in β-casein, and Phe23-Val24 and Trp164-Tyr165 in αs1-casein.

    “However, comparison of the results reported by Ramalho-Santos et al. [38,39], by Sousa and Malcata [55], and by Silva and Malcata [46] suggests that the bonds in pure caseins (or in sodium caseinate, for that matter) most susceptible to cardosins A and B are Leu 190 -Tyr 191 and Leu 127 -Thr 128 in β-casein (Fig. 1b), and Phe 23 -Val 24 and Trp 164 -Tyr 165 in α s1 -casein (Fig. 1c).”
    Quote in the paperNot a substantial claim1 of 4 sources checked
    • cites [38] 38. Ramalho-Santos M., Veríssimo P., Faro C., Pires E., Action on bovine α s1 -casein of cardosins A and B, aspartic proteinases from the flowers of the cardoon Cynara cardunculus L, Biochim. Biophys. Acta 1297 (1996) 83-89. source
    • cites [39] 39. Ramalho-Santos M., Veríssimo P., Faro C., Pires E., Action on bovine β-casein of cardosins A and B, X Congresso Nacional de Bioquímica, Braga, Portugal, 31st October-2nd November, 1996.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [55] 55. Sousa M.J., Malcata F.X., Proteolysis of ovine and caprine caseins in solution by enzymatic ex- tracts of Cynara cardunculus, Enzyme Microb. Technol. 22 (1998) 305-314. source
    • cites [46] 46. Silva S.V., Malcata F.X., On the activity and specificity of cardosin B, a plant proteinase, on ovine caseins, Food Chem. 67 (1999) 373-378. source
  • May combine two claims.

    Premisecitation

    Ovine β-casein is degraded by 48.2%, whereas caprine β-casein is degraded by 68.9%, both in caseinate form.

    “This is in agreement with Tavaria et al. [60], who reported that ovine β-casein is degraded by 48.2%, whereas caprine β-casein is degraded by 68.9%, both in caseinate form.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [60] 60. Tavaria F.K., Sousa M.J., Malcata F.X., Storage and lyophilization effects of extracts of Cynara cardunculus on the degradation of ovine and caprine caseins, Food Chem. 72 (2001) 79-88. source
  • May combine two claims.

    Premisecitation

    In solution, the fragment bovine αs1-casein (f24-199) was identified as the major peptide produced by the action of proteinases from C. cardunculus, a result confirmed independently by Macedo et al. [32].

    “In solution, the fragment bovine α s1 -casein (f24-199) was identified as the major peptide produced by the action of proteinases from C. cardunculus [48], a result confirmed independently by Macedo et al. [32].”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [48] 48. Sousa M.J.C.F., Plant rennet substitute from flowers of Cynara cardunculus. MSc thesis, Na- tional University of Ireland, Cork, Ireland, 1993.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [32] 32. Macedo I.Q., Faro C.J., Pires E.V., Caseinolytic specificity of cardosin, an aspartic protease from the cardoon Cynara cardunculus L.: action on bovine α s -and β-casein and comparison with chymosin, J. Agric. Food Chem. 44 (1996) 42-47. source

      The Results and Discussion identify αs1-casein Phe24–Trp199 as a peptide produced by cardosin, and the proteolysis pathway describes it as a product of the primary cleavage. The paper does not establish that it was the major peptide by abundance in solution; it also describes subsequent cleavage of that fragment. No page number is available in our copy. (LLM, conf=0.82)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Premisecitation

    Ovine cheeses manufactured from raw milk exhibited higher microbial counts than those from pasteurised milk without starter addition; however, the lowest microbial counts were recorded in cheese with starter added.

    “Ovine cheeses manufactured from raw milk exhibited higher microbial counts than those from pasteurised milk without starter addition [51]; however, the lowest microbial counts were recorded in cheese with starter added [7,51].”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [51] 51. Sousa M.J., Malcata F.X., Influence of pasteur- ization of milk and addition of starter cultures on protein breakdown in ovine cheeses manufac- tured with extracts from flowers of Cynara cardunculus, Food Chem. 57 (1996) 549-556. source
    • cites [7] 7. Carmona M.A., Sanjuan E., Gomez R., Fernandez-Salguero J., Effect of starter cultures on the physico-chemical and biochemical fea- tures in ewe cheese made with extracts from flowers of Cynara cardunculus L., J. Sci. Food Agric. 79 (1999) 737-744. source
  • May combine two claims.

    Findingown data

    In ovine cheese manufactured with C. cardunculus, Phe23-Val24 is already hydrolysed by 7 d, but not before 28 d of ripening when animal coagulant is employed instead.

    “In ovine cheese manufactured with C. cardunculus, Phe 23 -Val 24 is already hydrolysed by 7 d, but not before 28 d of ripening when animal coagulant is employed instead.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    These bands were produced in ovine milk cheeses from the very beginning of ripening, in caprine milk cheeses after 7 d and in bovine milk cheeses after 28 d, and all became more intense as ripening progressed.

    “These bands were produced in ovine milk cheeses from the very beginning of ripening, in caprine milk cheeses after 7 d and in bovine milk cheeses after 28 d, and all became more intense as ripening progressed.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingnone given

    Cardosin A and cardosin B both cleaved bovine αs1-casein at the bonds Phe23-Phe24, Trp164-Tyr165 and Phe153-Tyr154; cardosin A further cleaved the bond Tyr165-Tyr166, whereas cardosin B cleaved in addition the bond Phe150-Arg151.

    “Cardosin A and cardosin B both cleaved bovine α s1 -casein at the bonds Phe 23 -Phe 24 , Trp 164 -Tyr 165 and Phe 153 -Tyr 154 ; cardosin A further cleaved the bond Tyr 165 -Tyr 166 , whereas cardosin B cleaved in addition the bond Phe 150 -Arg 151”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingnone given

    The maximum activity of extracts of C. cardunculus was obtained via grinding the stylets for 36 s, using an extraction buffer with pH 5.9 without salt, and after homogenisation of the suspension for 15 min.

    “The maximum activity of extracts of C. cardunculus was obtained via grinding the stylets for 36 s, using an extraction buffer with pH 5.9 without salt, and after homogenisation of the suspension for 15 min.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Only the stylets and stigmae (violet part) possess a milk-clotting capacity.

    “however, it is now accepted that only the stylets and stigmae (violet part) possess a milk-clotting capacity [19,40].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [19] 19. Faro C.J., Purificação e caracterização físico- química da protease de Cynara cardunculus L. Ph.D. thesis, Universidade de Coimbra, Portu- gal, 1991.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [40] 40. Ramalho-Santos M., Pissarra J., Verissimo P., Pereira S., Salema R., Pires E., Faro C.J., Cardosin A, an abundant aspartic proteinase, ac- cumulates in protein storage vacuoles in the stig- matic papillae of Cynara cardunculus L., Planta 203 (1997) 204-212. source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Dried flowers of C. cardunculus have been successfully employed for many centuries in the Iberian Peninsula for the manufacture of traditional semi-hard cheeses.

    “however, dried flowers of C. cardunculus have been successfully employed for many centuries in the Iberian Peninsula for the manufacture of traditional semi-hard cheeses, i.e. such traditional cheese varieties as Serra da Estrela [1,30,44,65], La Serena (from ewe's milk) [23,36,42], Guía (from a mixture of ewe's and cow's milk) [25] and Los Pedroches (from ewe's milk) [7,24,66].”
    Quote in the paperNot a substantial claim0 of 4 sources checked
    • cites [1] 1. Barbosa M., "Cardo" (Cynara cardunculus L.) as vegetable rennet, Boletim do Departamento de Tecnologia e Indústria Alimentar, LNETI- DTIA, Lisboa, Portugal, 1983.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [30] 30. Macedo A., Malcata F.X., Oliveira J.C., The technology, chemistry, and microbiology of Serra cheese: a review, J. Dairy Sci. 76 (1993) 1725-1739. source
    • cites [44] 44. Roseiro M.L.B., Ewe's milk cheesemaking in Portugal using a vegetable rennet (a review), Sheep Dairy News 8 (1991) 65-80.
    • cites [65] 65. Vieira-de-Sá F., Barbosa M., Cheese-making experiments with a vegetable rennet from cardo (Cynara cardunculus L.), J. Dairy Res. 39 (1972) 335-343.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    The maximum (estimated) proteolytic activity is obtained after grinding stylets and stigmae for 36 s, using an extraction buffer with pH 5.9 in the absence of salt, and after having homogenised the ground stylets and stigmae in a buffer suspension for 15 min.

    “The maximum (estimated) proteolytic activity was obtained after grinding stylets and stigmae for 36 s, using an extraction buffer with pH 5.9 in the absence of salt, and after having homogenised the ground stylets and stigmae in a buffer suspension for 15 min [50].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [50] 50. Sousa M.J., Malcata F.X., Effects of processing conditions on the caseinolytic activity of pro- teinases from Cynara cardunculus L., Food Sci. Technol. Int. 2 (1996) 255-263.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Extracts of C. cardunculus hydrolyse the insulin B-chain at the carboxylic side of the peptide bond of Phe-X, Leu-X and Ile-X, where X is preferentially Val or Tyr; however, the specificity is not entirely determined by the nature of the residues since Leu11-Val12 of the insulin B-chain was not cleaved.

    “Extracts of C. cardunculus were reported to hydrolyse the insulin B-chain at the carboxylic side of the peptide bond of Phe-X, Leu-X and Ile-X, where X was preferentially Val or Tyr; however, the specificity was not entirely determined by the nature of the residues since Leu 11 -Val 12 of the insulin B-chain was not cleaved [20].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [20] 20. Faro C.J., Moir A.J.G., Pires E.V., Specificity of a milk clotting enzyme extracted from the thistle Cynara cardunculus L.: Action on oxidised in- sulin and κ-casein, Biotechnol. Lett. 14 (1992) 841-846. source
  • May combine two claims.

    Premisecitation

    The drying process decreases the proteolytic activity, especially that of cardosin B, and thus has a considerable effect on the observed overall proteolytic activity.

    “The drying process decreases the proteolytic activity, especially that of cardosin B (which is the stronger enzyme in the crude extract), and thus has a considerable effect on the observed overall proteolytic activity [17].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [17] 17. Esteves C., Estudo comparativo das características bioquímicas dos coalhos de Cynara cardunculus L., Cynara scolymus L., e Cynara humilis L. MSc thesis, Universidade de Coimbra, Portugal, 1995.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Cardosin A is similar to chymosin, whereas cardosin B resembles pepsin.

    “it was thus shown that cardosin A is similar to chymosin, whereas cardosin B resembles pepsin.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [63] 63. Veríssimo P., Esteves C., Faro C., Pires E., The vegetable rennet of Cynara cardunculus L. con- tains two proteinases with chymosin and pepsin- like specificities, Biotechnol. Lett. 17 (1995) 621-626.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Those proteinases have a pH optimum of 5.1 and are classified as aspartic proteinases.

    “Those proteinases were reported to have a pH optimum of 5.1 and they were classified as aspartic proteinases [27].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [27] 27. Heimgartner U., Pietrzak M., Geertsen R., Brodelius P., Silva Figueiredo A.C., Pais M.S.S., Purification and partial characterization of milk clotting proteases from flowers of Cynara cardunculus, Phytochemistry 29 (1990) 1405- 1410. source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Very few aspartic proteinases from plant origin have been isolated and partially characterised to date; one of their unique features is an extra segment of ca. 100 amino acids, which bears no sequence similarity with aspartic proteinases of mammalian or microbial origin.

    “Very few aspartic proteinases from plant origin have been isolated and partially characterised to date [59]; one of their unique features is an extra segment of ca. 100 amino acids, which bears no sequence similarity with aspartic proteinases of mammalian or microbial origin [21].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [59] 59. Tavaria F., Sousa M.J., Domingos A., Malcata F.X., Brodelius P., Clemente A., Pais M.S., Deg- radation of caseins from milk of different species by extracts of Centaurea calcitrapa, J. Agric. Food Chem. 45 (1997) 3760-3765. source
    • cites [21] 21. Faro C.J., Veríssimo P., Lin Y., Tang J., Pires E.V., in: Takahashi K. (Ed.), Aspartic protein- ases: Structure, Function, Biology and Biomed- ical Implications, Plenum Press, New York, USA, 1995, pp. 373-377.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Each cardosin occurs in dimeric form, with apparent molecular masses of 31 and 15 kg.mol-1 for the monomers of cardosin A, and 34 and 14 kg.mol-1 for those in cardosin B.

    “These authors also reported that each cardosin occurs in dimeric form, with apparent molecular masses of 31 and 15 kg .mol -1 for the monomers of cardosin A, and 34 and 14 kg .mol -1 for those in cardosin B.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [63] 63. Veríssimo P., Esteves C., Faro C., Pires E., The vegetable rennet of Cynara cardunculus L. con- tains two proteinases with chymosin and pepsin- like specificities, Biotechnol. Lett. 17 (1995) 621-626.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Only two of the three original peaks (peaks 2 and 3) possessed clotting and proteolytic activities; these two proteinases were later named cardosin A (peak 2) and cardosin B (peak 3).

    “Sousa [48] indicated that only two of the three original peaks (peaks 2 and 3) possessed clotting and proteolytic activities; these two proteinases were later named cardosin A (peak 2) and cardosin B (peak 3) [63].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [48] 48. Sousa M.J.C.F., Plant rennet substitute from flowers of Cynara cardunculus. MSc thesis, Na- tional University of Ireland, Cork, Ireland, 1993.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [63] 63. Veríssimo P., Esteves C., Faro C., Pires E., The vegetable rennet of Cynara cardunculus L. con- tains two proteinases with chymosin and pepsin- like specificities, Biotechnol. Lett. 17 (1995) 621-626.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Flowers of C. cardunculus contain one acid proteinase with two glycosylated sub-units, with molecular masses of 31 and 16 kg.mol-1.

    “Flowers of C. cardunculus were claimed to contain one acid proteinase with two glycosylated sub-units, with molecular masses of 31 and 16 kg .mol -1 ; that enzyme was found to induce milk coagulation through cleavage of the Phe 105 -Met 106 bond in bovine κ-casein [20].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [20] 20. Faro C.J., Moir A.J.G., Pires E.V., Specificity of a milk clotting enzyme extracted from the thistle Cynara cardunculus L.: Action on oxidised in- sulin and κ-casein, Biotechnol. Lett. 14 (1992) 841-846. source
  • May combine two claims.

    Premisecitation

    The peptide bond Leu192-Tyr193 in bovine β-casein is the most susceptible to hydrolysis by cardosin A or cardosin B, but the bonds Leu127-Thr128 and Leu165-Ser166 are also cleaved.

    “The peptide bond Leu 192 -Tyr 193 in bovine β-casein was reported to be the most susceptible to hydrolysis by cardosin A or cardosin B, but the bonds Leu 127 -Thr 128 and Leu 165 -Ser 166 were also cleaved [39].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [39] 39. Ramalho-Santos M., Veríssimo P., Faro C., Pires E., Action on bovine β-casein of cardosins A and B, X Congresso Nacional de Bioquímica, Braga, Portugal, 31st October-2nd November, 1996.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Cardosin A cleaves insulin B-chain at the bonds Leu15-Tyr16, Leu17-Val18 and Phe25-Try26, whereas cardosin B also cleaves Glu13-Ala14, Ala14-Leu15 and Phe24-Phe25, thus implying a broader specificity for the latter.

    “Later, cardosin A was reported to cleave insulin B-chain at the bonds Leu 15 -Tyr 16 , Leu 17 -Val 18 and Phe 25 -Try 26 , whereas cardosin B also cleaved Glu 13 -Ala 14 , Ala 14 -Leu 15 and Phe 24 -Phe 25 , thus implying a broader specificity for the latter [63].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [63] 63. Veríssimo P., Esteves C., Faro C., Pires E., The vegetable rennet of Cynara cardunculus L. con- tains two proteinases with chymosin and pepsin- like specificities, Biotechnol. Lett. 17 (1995) 621-626.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Cardosin A cleaves ovine caseinate at the bonds Phe105-Met106 of ovine κ-casein, Leu127-Thr128, Leu165-Ser166 and Leu190-Tyr191 of ovine β-casein, and Trp164-Tyr165 of ovine αs1-casein.

    “Cardosin A cleaved ovine caseinate at the bonds Phe 105 -Met 106 of ovine κ-casein, Leu 127 -Thr 128 , Leu 165 -Ser 166 and Leu 190 -Tyr 191 of ovine β-casein, and Trp 164 -Tyr 165 of ovine α s1 -casein [45]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [45] 45. Silva S.V., Malcata F.X., On the use of reversed- phase HPLC to characterize the specificity of cardosins from Cynara cardunculus toward ovine caseins, XXVII Scientific Meeting of Chromatography, Lugo, Spain, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Proteolysis by cardosin A is faster than by cardosin B.

    “proteolysis by cardosin A was reported to be faster than by cardosin B [47].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [47] 47. Silva S.V., Malcata F.X., Comparative catalytic action of two plant proteinases upon caprine ca- seins in solution, Food Chem. 71 (2000) 207-214. source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The bonds Leu165-Ser166 and Trp164-Tyr165 are the most susceptible to cardosin B when this enzyme acts upon isolated ovine β- and αs1-caseins, respectively.

    “The bonds Leu 165 -Ser 166 and Trp 164 -Tyr 165 were reported by Silva and Malcata [46] to be the most susceptible to cardosin B when this enzyme acted upon isolated ovine βand α s1 -caseins, respectively.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [46] 46. Silva S.V., Malcata F.X., On the activity and specificity of cardosin B, a plant proteinase, on ovine caseins, Food Chem. 67 (1999) 373-378. source
  • May combine two claims.

    Premisecitation

    Cardosin B cleaves ovine β-casein at three primary sites, viz. Leu127-Thr128, Leu165-Ser166 and Leu190-Tyr191, and ovine αs1-casein at two primary sites, viz. Leu156-Asp157 and Trp164-Tyr165.

    “cardosin B cleaved ovine β-casein at three primary sites, viz.Leu 127 -Thr 128 , Leu 165 -Ser 166 and Leu 190 -Tyr 191 , and ovine α s1 -casein at two primary sites, viz.Leu 156 -Asp 157 and Trp 164 -Tyr 165 [46].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [46] 46. Silva S.V., Malcata F.X., On the activity and specificity of cardosin B, a plant proteinase, on ovine caseins, Food Chem. 67 (1999) 373-378. source
  • May combine two claims.

    Premisecitation

    Ratio of hydrophobic to hydrophilic peptides decreases consistently during ripening in bovine and caprine cheeses, attaining 15.0 and 7.3, respectively, by end of ripening; in ovine cheese, this ratio goes through a maximum by 14 d and decreases thereafter to reach 29.9 by 68 d.

    “The ratio of hydrophobic to hydrophilic peptides (Tab.I) decreased consistently during ripening in bovine and caprine cheeses, hence attaining 15.0 and 7.3, respectively, by the end of ripening; however, this ratio went through a maximum by 14 d in ovine cheese and decreased thereafter to reach 29.9 by 68 d of ripening [49].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Percent degradation of bovine αs1-casein is 86% by 68 d of ripening, whereas degradation levels in the αs-casein region are 47% in ovine and 86% in caprine milk cheeses.

    “Sousa and Malcata [52] found that the percent degradation of bovine α s1 -casein is 86% by 68 d of ripening, whereas the bands with highest mobility (i.e.those designated as the α s -casein region) exhibit degradation levels of 47% and 86% in ovine and caprine milk cheeses, respectively (Fig. 3).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [52] 52. Sousa M.J., Malcata F.X., Comparative bio- chemical evolution during ripening of bovine, ovine and caprine cheeses manufactured with extracts of flowers of Cynara cardunculus, Z. Lebensm. Unters. Forsch. 205 (1997) 97-103.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Concentration of hydrophobic peptides increases up to 68 d of ripening in caprine cheese, and up to 14 d in bovine and ovine cheeses, but apparently decreases thereafter.

    “The concentration of hydrophobic peptides (Tab.I) increased up to 68 d of ripening in caprine cheese, and up to 14 d in bovine and ovine cheeses, but apparently decreased thereafter”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Degradation of αs-caseins decreases as NaCl content increases, yielding 86% for bovine and caprine cheeses and 46% for ovine cheeses containing ca. 2.1% or 3.0% NaCl, respectively.

    “The degradation of α s -caseins (again assessed by densitometry) decreased as the NaCl content increased (to yield 86% for bovine and caprine cheeses, and 46% for ovine cheeses, containing ca. 2.1% or 3.0% NaCl, respectively) [49], in agreement with results by Noomen [35] for Meshanger-type cheese, and Delacroix and Trossat [15] for Gruyère-type cheeses.”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [35] 35. Noomen A., Activity of proteolytic enzymes in simulated soft cheeses (Meshanger type). 2. Ac- tivity of calf rennet, Neth. Milk Dairy J. 32 (1978) 26-48.
    • cites [15] 15. Delacroix-Buchet A., Trossat P., Proteolysis and texture of Gruyere type cheeses. 1. Influence of water activity, Lait 71 (1991) 299-311.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Degradation of bovine β-casein is 33%, and that of combined β1- and β2-caseins is 33% in ovine and 43% in caprine milk cheeses.

    “Degradation of bovine β-casein was 33%, and that of combined β 1 -and β 2 -caseins was 33% and 43% in ovine and caprine milk cheeses, respectively (Fig. 3) [52].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [52] 52. Sousa M.J., Malcata F.X., Comparative bio- chemical evolution during ripening of bovine, ovine and caprine cheeses manufactured with extracts of flowers of Cynara cardunculus, Z. Lebensm. Unters. Forsch. 205 (1997) 97-103.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    At early ripening, WSN/TN differs significantly between ovine cheese and caprine cheese (8.28%) (P=0.03) and between ovine and bovine cheese (6.59%) (P=0.01), but not between caprine and bovine cheeses (P=0.10).

    “Statistically significant differences (on the 5% level) were found for WSN/TN between ovine cheese and either caprine (8.28%) (P = 0.03) or bovine (6.59%) (P = 0.01) cheeses, at early ripening, but no statistically significant differences were found between caprine and bovine cheeses (P = 0.10) [49].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    By 68 d of ripening, WSN/TN is significantly higher for caprine (48.7%) and ovine (46.4%) than for bovine (32.9%) cheeses, and caprine and ovine cheeses differ significantly from one another (P<0.0001).

    “These authors also showed that, by 68 d of ripening, WSN/TN was significantly higher for caprine (48.7%) (P < 0.0001) and ovine (46.4%) (P < 0.0001) than for bovine (32.9%) cheeses; however, caprine and ovine cheeses were significantly different from one another (P < 0.0001).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Concentration of hydrophilic peptides increases up to 68 d of ripening in ovine and caprine cheeses, and up to 56 d in bovine cheese.

    “ripening in ovine and caprine cheeses, and up to 56 d in bovine cheese [49].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    In Cheddar cheese, reduction in fat level results in greater degradation of β-casein; concentration of intact β-casein in full fat and low fat Cheddar cheeses after 180 d of ripening were ca. 90% and 58%, respectively.

    “In Cheddar cheese manufactured with milk standardised to different fat contents, reduction in the fat level resulted in greater degradation of β-casein; the concentration of intact β-casein in the full fat and low fat Cheddar cheeses after 180 d of ripening were ca.90% and 58%, respectively [22].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [22] 22. Fenelon M.A., Guinee T.P., Primary proteolysis and textural changes during ripening in Cheddar 168 M.J. Sousa, F.X. Malcata cheese manufactured to different fat contents, Int. Dairy J. 10 (2000) 151-158. source
  • May combine two claims.

    Premisecitation

    γ-caseins arising from degradation of β-casein by plasmin increase in concentration throughout ripening of bovine cheeses, but cannot be identified in WISF of either ovine or caprine cheeses.

    “The γ -caseins (i.e.γ 1 -, γ 2 -and γ 3 -caseins) arising from degradation of the β-casein by plasmin [68] increased in concentration throughout ripening of bovine cheeses, but could not be identified in the WISF of either ovine or caprine cheeses [49].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [68] 68. Visser S., Proteolytic enzymes and their action on milk proteins (a review), Neth. Milk Dairy J. 35 (1981) 65-88.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationnone given

    Proteinases from C. cardunculus (like most coagulants) and, probably to a lesser extent, plasmin hydrolyse caseins down to large- and intermediate-size peptides, which are then broken down by residual coagulant, as well as by proteinases and peptidases from starter and nonstarter bacteria.

    “The proteinases from C. cardunculus (like those of most coagulants) and, probably to a lesser extent, plasmin hydrolyse caseins down to large-and intermediate-size peptides, which are then broken down by residual coagulant, as well as by proteinases and peptidases from starter and nonstarter bacteria.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationcitation

    The most susceptible bond of β-casein has been cleaved, so the complementary fragment should be β-casein (f1-192) in bovine β-casein, or β-casein (f1-190) in ovine and caprine β-casein.

    “β-casein (f191-) in ovine and caprine cheeses (Tab.III), confirmed that the most susceptible bond of β-casein has been cleaved, so the complementary fragment should be the peptide β-casein (f1-192) (a) in bovine β-casein, or β-casein (f1-190) (d and g) in ovine and caprine β-casein, respectively.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    The main hydrolysis sites associated with C. cardunculus coagulant action are Leu127-Thr128, Leu165-Ser166 and Leu192-Tyr193 in bovine β-casein, Leu127-Thr128 and Leu190-Tyr191 in ovine β-casein, and Leu127-Thr128 and Leu190-Tyr191 in caprine β-casein.

    “The main hydrolysis sites identified in association with said coagulant action were Leu 127 -Thr 128 , Leu 165 -Ser 166 and Leu 192 -Tyr 193 in bovine β-casein, Leu 127 -Thr 128 and Leu 190 -Tyr 191 in ovine β-casein [56], and Leu 127 -Thr 128 and Leu 190 -Tyr 191 in caprine β-casein.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [56] 56. Sousa M.J., Malcata F.X., Identification of pep- tides from ovine milk cheese manufactured with animal rennet or extracts of Cynara cardunculus as coagulant, J. Agric. Food Chem. 46 (1998) 4034-4041. source
  • May combine two claims.

    Interpretationown data

    Caseins from bovine, ovine and caprine milk share relatively similar amino acid sequences, implying that they should be similarly hydrolysed in the same susceptible regions.

    “Caseins from the three types of milk share relatively similar amino acid sequences (Fig. 1a-d), thus implying that they should be similarly hydrolysed in the (same) susceptible regions.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Sousa [49] sequenced peptides β-casein (f128-), β-casein (f166-) and β-casein (f193-) from bovine β-casein, and β-casein (f128-) and β-casein (f191-) from ovine and caprine β-casein, which were probably produced by plant proteinases of interest.

    “Sousa [49] sequenced the peptides β-casein (f128-), β-casein (f166-) and β-casein (f193-) from bovine β-casein (Tab.III), and β-casein (f128-) and β-casein (f191-) from ovine and caprine β-casein (Tab.III), which were probably produced by the plant proteinases of interest.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationcitation

    Proteinases from C. cardunculus (and also chymosin) have been implicated in the formation of bitter peptides in cheese, so factors that affect retention and activity of coagulant in the curd influence development of bitterness.

    “Proteinases from C. cardunculus (and also chymosin) have been implicated in the formation of bitter peptides in cheese, so factors that affect retention (and also activity) of coagulant in the curd will surely influence development of bitterness.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    Formation of hydrophobic peptides in cheese manufactured with plant coagulant proceeds for a longer time than in cheese manufactured with chymosin; highest level of hydrophobic peptides occurs by 24 h of ripening when plant coagulant is employed, ca. two-fold that found with chymosin.

    “Gaya et al. [26] reported that the formation of hydrophobic peptides in cheese manufactured with plant coagulant proceeded for a longer time than in cheese manufactured with chymosin; these authors also pointed out the highest level of hydrophobic peptides by 24 h of ripening when plant coagulant was employed, which was ca.two-fold that found in cheese manufactured with chymosin.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [26] 26. Gaya P., Carrera E., Medina M., Nuñez M., For- mation of hydrophobic peptides during the man- ufacture of ewe's milk Manchego cheese using different milk coagulants, Milchwissenchaft 54 (1999) 556-558.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Several peptide fragments were reported in bovine, ovine and caprine β-casein, but only a few could be traced as having been released by coagulant proteinases.

    “Several peptide fragments were reported in bovine, ovine and caprine β-casein (Tab.III) [49], but only a few could be traced as having been released by coagulant proteinases.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Extracts of C. cardunculus or C. humilis have no appreciable effect on bulk composition, but extracts of C. humilis resulted in higher lactic acid content and higher pH values than cheeses produced with C. cardunculus.

    “Vioque et al. [66] reported that extracts of C. cardunculus or C. humilis have no appreciable effect on bulk composition, but extracts of the latter resulted in higher lactic acid content and higher pH values than in those cheeses produced with C. cardunculus.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [66] 66. Vioque M., Gómez R., Sánchez E., Mata C., Tejada L., Fernández-Salguero J., Chemical and microbiological characteristics of ewe's milk cheese manufactured with extracts from flowers of Cynara cardunculus and Cynara humilis, J. Agric. Food Chem. 48 (2000) 451-456. source
  • May combine two claims.

    Premisecitation

    Microbiological viable counts (total, coliforms and lactobacilli) were similar in cheeses produced with both types of plant coagulant, although enterobacteria, yeasts and moulds were found at higher viable numbers in cheese produced with C. humilis than with C. cardunculus.

    “Those authors reported that microbiological viable counts (total, coliforms and lactobacilli) were similar in cheeses produced with both types of plant coagulant, although enterobacteria, yeasts and moulds were found at higher viable numbers in cheese produced with C. humilis than with C. cardunculus.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [66] 66. Vioque M., Gómez R., Sánchez E., Mata C., Tejada L., Fernández-Salguero J., Chemical and microbiological characteristics of ewe's milk cheese manufactured with extracts from flowers of Cynara cardunculus and Cynara humilis, J. Agric. Food Chem. 48 (2000) 451-456. source
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationreasoning

    The fact that in Cheddar and Camembert the bond Phe23-Val24 is rapidly hydrolysed is probably due to the larger amounts of animal rennet added.

    “the fact that in Cheddar and Camembert the bond Phe 23 -Val 24 is rapidly hydrolysed is probably due to the larger amounts of animal rennet added”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    WSN was higher in cheeses manufactured with extracts of C. cardunculus than with C. humilis, but WSN in cheeses with C. humilis was much higher than in Los Pedroches cheese manufactured with chymosin.

    “Vioque et al. [66] showed that WSN was higher in cheeses manufactured with extracts of C. cardunculus than with C. humilis, but WSN in cheeses with C. humilis was much higher than in Los Pedroches cheese manufactured with chymosin [24].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [66] 66. Vioque M., Gómez R., Sánchez E., Mata C., Tejada L., Fernández-Salguero J., Chemical and microbiological characteristics of ewe's milk cheese manufactured with extracts from flowers of Cynara cardunculus and Cynara humilis, J. Agric. Food Chem. 48 (2000) 451-456. source
    • cites [24] 24. Fernández-Salguero J., Sanjuán E., Influence of vegetable and animal rennet on proteolysis dur- ing ripening in ewe's milk cheese, Food Chem. 64 (1999) 177-183. source
  • May combine two claims.

    Interpretationcitation

    Proteolysis in cheese manufactured with these extracts is associated mainly with the action of this rennet rather than with the prevailing microflora or otherwise adventitious enzymes, and proceeds to a high extent but a low degree.

    “Proteolysis in cheese manufactured with these extracts is associated mainly with the action of this rennet rather than with the prevailing microflora or otherwise adventitious enzymes, and proceeds to a high extent but a low degree.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    The type of coagulant has no significant effect upon cheese bulk chemical composition throughout ripening, and no significant microbiological differences were detected between cheeses manufactured with C. cardunculus or animal rennet.

    “Comparing averages and 95% confidence intervals, it has been stated [53] that the type of coagulant has no significant effect upon cheese bulk chemical composition throughout ripening, and that no significant microbiological differences were detected between cheeses manufactured with C. cardunculus or animal rennet.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [53] 53. Sousa M.J., Malcata, F.X., Comparison of plant and animal rennets in terms of microbiological, chemical and proteolysis characteristics of ovine cheese, J. Agric. Food Chem. 45 (1997) 74-81. source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The electrophoretic patterns of the WISF of both cheeses unfold a higher susceptibility of αs- than β-casein to proteolysis.

    “The electrophoretic patterns of the WISF of both cheeses were claimed to unfold a higher susceptibility of α s -than β-casein to proteolysis [24,36,53].”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [24] 24. Fernández-Salguero J., Sanjuán E., Influence of vegetable and animal rennet on proteolysis dur- ing ripening in ewe's milk cheese, Food Chem. 64 (1999) 177-183. source
    • cites [36] 36. Núñez M., Fernández-del-Pozo B., Rodríguez- Marin M.A., Gaya, P., Medina M., Effect of veg- etable and animal rennet on chemical, microbio- logical, rheological and sensory characteristics of La Serena cheese, J. Dairy Res. 58 (1991) 511-519. source
    • cites [53] 53. Sousa M.J., Malcata, F.X., Comparison of plant and animal rennets in terms of microbiological, chemical and proteolysis characteristics of ovine cheese, J. Agric. Food Chem. 45 (1997) 74-81. source
  • May combine two claims.

    Premisecitation

    Cheeses manufactured with plant coagulant exhibited significantly higher levels of WSN/TN; that coagulant had significantly less proteolytic activity upon αs and β-caseins than animal rennet.

    “Cheeses manufactured with plant coagulant exhibited significantly higher levels of WSN/TN; that coagulant had significantly less proteolytic activity upon α sand β-caseins than animal rennet [53].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [53] 53. Sousa M.J., Malcata, F.X., Comparison of plant and animal rennets in terms of microbiological, chemical and proteolysis characteristics of ovine cheese, J. Agric. Food Chem. 45 (1997) 74-81. source
  • May combine two claims.

    Premisecitation

    The peptides β-casein (f128-), β-casein (f166-) and β-casein (f191-) were produced by plant rennet only, whereas β-casein (f164-) and β-casein (f191-) were produced by animal rennet only.

    “The peptides β-casein (f128-), β-casein (f166-) and β-casein (f191-) were produced by plant rennet only, whereas β-casein (f164-) and β-casein (f191-) were produced by animal rennet only [56].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [56] 56. Sousa M.J., Malcata F.X., Identification of pep- tides from ovine milk cheese manufactured with animal rennet or extracts of Cynara cardunculus as coagulant, J. Agric. Food Chem. 46 (1998) 4034-4041. source
  • May combine two claims.

    Premisecitation

    The peptide αs1-casein (f24-165) is present only in ovine cheese manufactured with C. cardunculus, whereas the peptide αs1-casein (f120-191) was only produced by animal rennet.

    “These bands were identified as the peptide α s1 -casein (f24-165), which is present only in ovine cheese manufactured with C. cardunculus, whereas the peptide α s1casein (f120-191) was only produced by animal rennet [56].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [56] 56. Sousa M.J., Malcata F.X., Identification of pep- tides from ovine milk cheese manufactured with animal rennet or extracts of Cynara cardunculus as coagulant, J. Agric. Food Chem. 46 (1998) 4034-4041. source
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    Identical conditions, including standardised amounts of plant and animal coagulants, were employed.

    “note that identical conditions, including standardised amounts of plant and animal coagulants, were employed”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    The water-soluble fraction of pasteurised milk cheeses with starter addition showed differences by long ripening times relative to raw milk cheeses and pasteurised milk cheeses without starter addition; furthermore, a higher number of peptides was present in pasteurised milk cheeses with starter addition.

    “However, their WSF showed differences by long ripening times for pasteurised milk cheeses with starter addition relative to raw milk cheeses and pasteurised milk cheeses without starter addition; furthermore, a higher number of peptides was present in pasteurised milk cheeses with starter addition [49].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [49] 49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationown data

    Significant effects of the breed source of milk were observed with respect to the ripening index (WSN/TN); higher proteolysis was recorded in ovine and caprine than in bovine cheeses.

    “Significant effects of the breed source of milk were observed with respect to the ripening index (WSN/TN); higher proteolysis was recorded in ovine and caprine than in bovine cheeses.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    Pasteurisation and addition of starter cultures have no appreciable effect on the characteristics of the cheeses throughout ripening; nevertheless, differences were found between the cheeses in terms of WSN/TN, as well as between cheeses manufactured from pasteurised milk with or without starter addition, in terms of TCASN and PTASN.

    “Pasteurisation and addition of starter cultures have no appreciable effect on the characteristics of the cheeses throughout ripening; nevertheless, differences were found between the cheeses in terms of WSN/TN, as well as between cheeses manufactured from pasteurised milk with or without starter addition, in terms of TCASN and PTASN.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    Cardosin A is similar to chymosin, and cardosin B is similar to chymosin, in terms of their specificity and kinetic parameters.

    “cardosin A was claimed to be similar to chymosin, whereas cardosin B was claimed to be similar to chymosin, in terms of their specificity and kinetic parameters.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationnone given

    Proteinases of C. cardunculus produced higher levels of the ripening index than commercial animal rennet, even though the former led to lower levels of the ripening depth index (TCASN/TN) and the free amino acid index (PTASN/TN).

    “Proteinases of C. cardunculus produced higher levels of the ripening index than commercial animal rennet, even though the former led to lower levels of the ripening depth index (TCASN/TN) and the free amino acid index (PTASN/TN).”
    Quote in the paperSubstantial claim
67 of 67
  • The paper relies on this without support.

    Standard conditions for the cutting and drying processes do not in practice exist.

    “Standard conditions for the cutting and drying processes do not in practice exist.”
  • The paper relies on this without support.

    Ovine milk has a higher fat content than caprine or bovine milk.

    “as ovine milk has a higher fat content than those of the latter”
2 of 2

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • A comparison between chymosin and cardosins shows that cardosins have a greater proteolytic activity, which leads to the onset of bitter flavors.

    “However, a comparison between chymosin and cardosins shows that the latter have a greater PA, which leads to the onset of bitter flavors [44,45].”

    From Plant Milk-Clotting Enzymes for Cheesemaking (2022) · cites this paper as [45]

    Section 5.1 (p. 162) implicates C. cardunculus proteinases in forming bitter peptides, but also implicates chymosin; it does not establish that greater cardosin activity causes bitter flavors. Section 5.2 (page unavailable) reports significantly less activity by the plant coagulant on α- and β-caseins than by animal rennet in one cheese comparison, so the claimed general activity ranking is not supported. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Bovine peptide ratio does not decrease consistently

    Minor

    The claimed consistent decline in the bovine ratio conflicts with increases from day 7 to day 14 and from day 56 to day 68.

  • Incorrect initial caprine peptide ratio

    Minor

    The reported hydrophobic-to-hydrophilic ratio is 133.4, but 2332.8 divided by 19.0 is approximately 122.8.

    Reported 133.4 · recomputed 122.778947

  • Bovine hydrophobic peptides exceed their stated day-14 peak

    Minor

    The text says bovine hydrophobic peptides decreased after day 14, but the table gives a higher value at day 56 than at day 14.

  • Cardosin B is likened to two different enzymes

    Minor

    The conclusions describe cardosin B as chymosin-like, whereas the earlier characterization says it resembles pepsin.

4 of 4

Cites

Flagged first, then by citations

5 of the 62 references couldn’t be matched to a known paper.

Research works printed but not linked: 6

  1. [9]9. Castanheira P.M.D., Distribuição diferencial das cardosinas A e B ao longo do pistilo de Cynara cardunculus L., MSc thesis, Universidade de Coimbra, Coimbra, Portugal, 1998.
  2. [17]17. Esteves C., Estudo comparativo das características bioquímicas dos coalhos de Cynara cardunculus L., Cynara scolymus L., e Cynara humilis L. MSc thesis, Universidade de Coimbra, Portugal, 1995.
  3. [21]21. Faro C.J., Veríssimo P., Lin Y., Tang J., Pires E.V., in: Takahashi K. (Ed.), Aspartic protein- ases: Structure, Function, Biology and Biomed- ical Implications, Plenum Press, New York, USA, 1995, pp. 373-377.
  4. [48]48. Sousa M.J.C.F., Plant rennet substitute from flowers of Cynara cardunculus. MSc thesis, Na- tional University of Ireland, Cork, Ireland, 1993.
  5. [49]49. Sousa M.J.C.F., Characterization of the proteolytic action of the flowers of Cynara cardunculus in ovine, caprine and bovine cheeses. Ph.D. thesis, Escola Superior de Biotecnologia, Porto, Portugal, 1998.
  6. [68]68. Visser S., Proteolytic enzymes and their action on milk proteins (a review), Neth. Milk Dairy J. 35 (1981) 65-88.

Cited by

Sorted by citations

Authors
Sousa, M. J., & Malcata, F. X.
Affiliations
Universidade Católica Portuguesa (PT)
Venue
Le Lait
Publisher
EDP Sciences
Published
2002-03
Volume
82
Issue
2
Pages
151-170
ISSN
  • 0023-7302 (ISSN-L)
  • 1297-9694
OpenAlex
W2137155130
Cited by
84
References
62
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 4 · 2021: 5 · 2020: 2 · 2019: 5 · 2018: 8 · 2017: 5 · 2016: 3 · 2015: 2 · 2014: 5 · 2013: 2 · 2012: 3
FWCI
3.97
Type
journal article
Language
en
Open access
Locations
Le Lait (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Proteins in Food Systems
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Cynara cardunculus studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Enzyme Production and Characterization
Keywords
Cynara cardunculus, plant coagulant, cheese ripening, proteolysis, casein hydrolysis, ewe's milk cheese, goat cheese, cow's milk cheese, starter cultures, cheese microbiota, thermal processing

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-11.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-11.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

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