The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
A bacterial clone synthesizing proinsulin.
Open accessAbstract
We have cloned double-stranded cDNA copies of a rat preproinsulin messenger RNA in Escherichia coli chi1776, using the unique Pst endonuclease site of plasmid pBR322 that lies in the region encoding amino acids 181-182 of penicillinase. This site was reconstructed by inserting the cDNA with an oligo(dG)-oligo(dC) joining procedure. One of the clones expresses a fused protein bearing both insulin and penicillinase antigenic determinants. The DNA sequence of this plasmid shows that the insulin region is read in phase; a stretch of six glycine residues connects the alanine at position 182 of penicillinase to the fourth amino acid, glutamine, of rat proinsulin.
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
Cites
Gilbert, W. (1978) · Nature · doi:10.1038/271501a0 · Cited by 2,300
Self-citation
Cited by
Plasmid screening at high colony density
Hanahan, D., & Meselson, M. (1980) · Gene · doi:10.1016/0378-1119(80)90144-4 · Cited by 1,078
A Short Polypeptide Marker Sequence Useful for Recombinant Protein Identification and Purification
Hopp, T. P., Prickett, K. S., Price, V. L., Libby, R. T., March, C. J., Pat Cerretti, D., Urdal, D. L., & Conlon, P. J. (1988) · Bio/Technology · doi:10.1038/nbt1088-1204 · Cited by 957
A cDNA cloning vector that permits expression of cDNA inserts in mammalian cells.
Okayama, H., & Berg, P. (1983) · Molecular and Cellular Biology · doi:10.1128/mcb.3.2.280 · Cited by 933
Ravetch, J. V., Siebenlist, U., Korsmeyer, S., Waldmann, T., & Leder, P. (1981) · Cell · doi:10.1016/0092-8674(81)90400-1 · Cited by 930
The purification of eukaryotic polypeptides synthesized in Escherichia coli
Marston, F. A. (1986) · Biochemical Journal · doi:10.1042/bj2400001 · Cited by 836
Metadata
- Authors
- Villa-Komaroff, L., Efstratiadis, A., Broome, S., Lomedico, P., Tizard, R., Naber, S. P., Chick, W. L., & Gilbert, W.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1978-08
- Volume
- 75
- Issue
- 8
- Pages
- 3727-3731
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2012880496
- Cited by
- 510
- References
- 1
- FWCI
- 43.74
- 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: A bacterial clone synthesizing proinsulin. https://app.cochat.ai/papers/10.1073/pnas.75.8.3727
- The paper
- Villa-Komaroff, L., Efstratiadis, A., Broome, S., Lomedico, P., Tizard, R., Naber, S. P., Chick, W. L., & Gilbert, W. (1978). A bacterial clone synthesizing proinsulin. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.75.8.3727
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.