The DOI matches its Crossref record.
Nucleotide sequence of the E. coli gene coding for dihydrofolate reductase
Open accessAbstract
Plasmid pLC1437a contains DNA from Escherichia coli K12 including fol, the structural gene for dihydrofolate reductase. The fol gene was mapped on this plasmid relative to several restriction endonuclease cleavage sites. fol was also cloned from strain RSO and the nucleotide sequence for the entire fol gene and its flanking regions from this strain was determined. The amino acid sequence predicted from the nucleotide sequence differs in only a few respects from the reported amino acid sequence of dihydrofolate reductase from E. coli B. The major RNA transcripts initiated at the fol promotor in vivo are approximately 550 and 590 nucleotides long. In addition to these, several longer transcripts (up to 1400 nucleotides) are present in lesser amounts. A new procedure is described for 3' end labeling of DNA fragments having blunt ends using E. coli exonuclease III and avian myeloblastoma virus reverse transcriptase.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Codon catalog usage is a genome strategy modulated for gene expressivity
Grantham, R., Gautier, C., Gouy, M., Jacobzone, M., & Mercier, R. (1981) · Nucleic Acids Research · doi:10.1093/nar/9.1.213-b · Cited by 939
Trimethoprim and sulfonamide resistance.
Huovinen, P., Sundström, L., Swedberg, G., & Sköld, O. (1995) · Antimicrobial Agents and Chemotherapy · doi:10.1128/aac.39.2.279 · Cited by 523
Matthews, D. A., Bolin, J. T., Burridge, J. M., Filman, D. J., Volz, K. W., Kaufman, B. T., Beddell, C. R., Champness, J. N., Stammers, D. K., & Kraut, J. (1985) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(18)89743-5 · Cited by 271
Molecular basis of Sindbis virus neurovirulence in mice
Lustig, S., Jackson, A. C., Hahn, C. S., Griffin, D. E., Strauss, E. G., & Strauss, J. H. (1988) · Journal of Virology · doi:10.1128/jvi.62.7.2329-2336.1988 · Cited by 253
FLENSBURG, J., & SKÖLD, O. (1987) · European Journal of Biochemistry · doi:10.1111/j.1432-1033.1987.tb10664.x · Cited by 103
Metadata
- Authors
- Smith, D. R., & Calvo, J. M.
- Venue
- Nucleic Acids Research
- Publisher
- Oxford University Press (OUP)
- Published
- 1980
- Volume
- 8
- Issue
- 10
- Pages
- 2255-2274
- ISSN
- 0305-1048 (ISSN-L)
- 1362-4962
- OpenAlex
- W2065930024
- Cited by
- 367
- References
- 0
- FWCI
- 39.04
- Type
- journal article
- Language
- en
- Open access
- green
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.
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.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Nucleotide sequence of the E. coli gene coding for dihydrofolate reductase. https://app.cochat.ai/papers/10.1093/nar/8.10.2255
- The paper
- Smith, D. R., & Calvo, J. M. (1980). Nucleotide sequence of the E. coli gene coding for dihydrofolate reductase. Nucleic Acids Research. https://doi.org/10.1093/nar/8.10.2255
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.