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Deoxynucleoside triphosphate pool changes and UV-induced depression of DNA synthesis.

Abstract：

:It has been reported that changes in deoxynucleotide pool levels following exposure to UV might lead to an overestimation of the UV-induced depression in DNA synthesis as analyzed by incorporation of 3H-thymidine (1). We attempted to determine the importance of such pool effects in two ways. First, we examined the grain density along DNA fiber autoradiographs obtained from CHO AA8, and CHO UV-5 cells exposed or sham exposed to UV. Exposure to UV did not alter the grain density immediately or 5 hours after exposure to UV in these cell lines. Second, we examined the kinetics of incorporation of 3H-dTTP in permeabilized AA8 cells under conditions of increased dCTP or increased exogenous dTTP levels. The extent of the depression of 3H-dTTP was identical under all incubation conditions.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Griffiths TD,Ling SY

doi

10.1016/0006-291x(84)90292-4

subject

Has Abstract

pub_date

1984-09-17 00:00:00

pages

742-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(84)90292-4

journal_volume

123

pub_type

杂志文章

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