Ultraviolet light induced thymine dimers and repair processes in the alga Eudorina elegans
- 1 December 1972
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Microbiology
- Vol. 18 (12) , 1809-1815
- https://doi.org/10.1139/m72-283
Abstract
A fraction of the cellular DNA of the colonial green alga Eudorina elegans strain 1193 can be specifically labeled with 3H-thymidine but not by 3H-thymine. Ultraviolet (UV) irradiation of E. elegans leads to the production of thymine dimers as determined by extraction, hydrolysis, and chromatography of 3H-thymidine-labeled cells. Removal of dimers occurs by processes involving visible light (photoreactivation), but dark repair (excision repair) has not been detected in the labeled fraction. A relationship between UV exposure and thymine dimer production has been determined.Keywords
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