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Isolation and characterization of CNBr peptides of human (alpha 1 (III) )3 collagen and tissue distribution of (alpha 1 (I) )2 alpha 2 and (alpha 1 (III) )3 collagens.

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Epstein, EH, Munderloh, NH·1975·Journal of Biological Chemistry

Abstract

[Alpha 1(III)]3 collagen was solubilized by pepsin digestion of normal human placental membranes and was purified by differential salt precipitation and carboxymethylcellulose chromatography. This collagen was digested with CNBr, and the resultant nine peptides were isolated and characterized. The chains are cross-linked by cysteinyl residues in the COOH-terminal peptide. Isolation of peptides derived from CNBr digestion of insoluble tissues was used as an assay for the presence of [alpha 1(I)]2alpha 2 and [alpha 1(III)]3 collagens. Both types are present in human skin, intestine, liver, spleen, kidney, lung, aorta, umbilical cord, placental membranes, and myocardium. Bone and tendon contain [alpha 1(I)]2alpha 2 collagen but, unlike the other tissues, lack [alpha 1(III)]3 collagen. Both [alpha 1(I)]2alpha 2 and[alpha 1(III)]3 collagens are present in scars of human skin, myocardium, tendon, and liver and of rabbit skin. The degree of hydroxylation of proline was 4 to 5% lower in the same peptides in skin, bone, and tendon than in the other tissues. The degree of hydroxylation of lysine in the same peptides derived from different tissues varied more widely.

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Metadata

Authors
Epstein, E., & Munderloh, N.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1975-12
Volume
250
Issue
24
Pages
9304-9312
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1491180863
Cited by
168
References
1
FWCI
15.52
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Isolation and characterization of CNBr peptides of human (alpha 1 (III) )3 collagen and tissue distribution of (alpha 1 (I) )2 alpha 2 and (alpha 1 (III) )3 collagens. https://app.cochat.ai/papers/10.1016/s0021-9258(19)40644-3
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Epstein, E., & Munderloh, N. (1975). Isolation and characterization of CNBr peptides of human (alpha 1 (III) )3 collagen and tissue distribution of (alpha 1 (I) )2 alpha 2 and (alpha 1 (III) )3 collagens. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(19)40644-3

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