Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 170

The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.

T4 Endonuclease Involved in Repair of DNA

Open access
Yasuda, Seiichi, Sekiguchi, Mutsuo·1970·Proceedings of the National Academy of Sciences

Abstract

An enzyme activity, named T4 endonuclease V, was purified from T4-infected Escherichia coli . The enzyme induces single-stranded breaks in ultraviolet-irradiated DNA but does not act on native or heat-denatured DNA. The enzyme activity is dependent on the dose of ultraviolet irradiation, and the number of the breaks formed is approximately equal to the number of pyrimidine dimers present in the DNA. Denatured DNA, which has been exposed to ultraviolet light, is also attacked by the enzyme although the extent of the reaction is greater with irradiated native DNA. The enzyme shows optimal activity at pH 7.5 and does not require added divalent ions. When the enzyme-treated, irradiated DNA is subjected to stepwise degradation by spleen phosphodiesterase, dimers are released more rapidly than thymine into the acid-soluble fraction, suggesting that the enzyme induces a break at the 5′-side of a pyrimidine dimer. The enzyme, whose formation is controlled by the v + gene of T4, appears to be responsible for the first step of excision repair.

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.67.4.1839

Cites

2 of 2 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 2 references

Cited by

See all 170

Metadata

Authors
Yasuda, S., & Sekiguchi, M.
Venue
Proceedings of the National Academy of Sciences
Published
1970-12
Volume
67
Issue
4
Pages
1839-1845
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2040253399
Cited by
170
References
2
FWCI
4.60
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: T4 Endonuclease Involved in Repair of DNA. https://app.cochat.ai/papers/10.1073/pnas.67.4.1839
The paper
Yasuda, S., & Sekiguchi, M. (1970). T4 Endonuclease Involved in Repair of DNA. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.67.4.1839

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.