Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 342

The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.

Methyl-directed repair of DNA base-pair mismatches in vitro.

Open access
Lu, A L, Clark, S, Modrich, P·1983·Proceedings of the National Academy of Sciences

Abstract

An assay has been developed that permits analysis of DNA mismatch repair in cell-free extracts of Escherichia coli. The method relies on repair of heteroduplex molecules of f1 R229 DNA, which contain a base-pair mismatch within the single EcoRI site of the molecule. As observed with mismatch heteroduplexes of lambda DNA [Pukkila, P. J., Peterson, J., Herman, G., Modrich, P. & Meselson, M. (1983) Genetics, in press], in vivo mismatch correction of f1 heteroduplexes is directed by the state of dam methylation of d(G-A-T-C) sequences within the DNA duplex. Thus, the heteroduplex (formula: see book) is repaired in vivo to an EcoRI-sensitive form if the strand bearing the wild-type EcoRI sequence carries the dam modification and the other does not. Such molecules are also subject to mismatch repair by E. coli extracts. The in vitro activity is also dependent on ATP, the state of dam methylation of mismatch heteroduplexes, and products of mutH, mutL, mutS, and uvrE loci. However, crude fractions deficient in these gene products do complement in the cell-free system, thus providing assays for their isolation. The in vitro reaction is accompanied by repair synthesis on the unmethylated DNA strand.

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.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.80.15.4639

Cites

21 of 21 references verified0 citation errors · 0 not checkable

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.

A few free checks a day · papers already verified open instantly · results are public

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

Show all 21 references

Cited by

See all 342

Metadata

Authors
Lu, A. L., Clark, S., & Modrich, P.
Venue
Proceedings of the National Academy of Sciences
Published
1983-08
Volume
80
Issue
15
Pages
4639-4643
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2140852958
Cited by
342
References
21
FWCI
9.20
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: Methyl-directed repair of DNA base-pair mismatches in vitro. https://app.cochat.ai/papers/10.1073/pnas.80.15.4639
The paper
Lu, A. L., Clark, S., & Modrich, P. (1983). Methyl-directed repair of DNA base-pair mismatches in vitro. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.80.15.4639

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.