Authors

Robert Rothman

Abstract

Article may be found at: http://jb.asm.org/cgi/reprint/143/1/520 The observation that polA1 and recL152 mutations result in both slow pyrimidine dimer excision and large repair patch size leads to the hypothesis that patch size is directly related to the rate of excision. In this study caffeine, a known inhibitor of excision repair, was used to examine the extent of correlation between excision rate and patch size by measuring patch size in the presence of several concentrations of caffeine. Both the rate of excision and the resistance to ultraviolet radiation were reduced with increasing concentrations of caffeine after irradiation. Caffeine also inhibited the rate at which incisions were made and prolonged the time required to rejoin the discontinuities. Patch size, however, was unaffected by caffeine treatment.

Publication Date

1980

Comments

This research was supported by Public Health Service National Research Service Award GM06643 from the National Institute of General Medical Sciences and by the U. S. Department of Energy. Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type

Article

Department, Program, or Center

Thomas H. Gosnell School of Life Sciences (COS)

Campus

RIT – Main Campus

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