[formula: see text] UV irradiation of spores results in the formation of the spore photoproduct. This novel DNA photolesion is repaired in the germinating spore in a reaction catalyzed by the spore photoproduct lyase. Model studies, using a simple bispyrimidine, suggest that this repair reaction proceeds by hydrogen abstraction from C6 of the spore photoproduct followed by beta-scission of the bond linking the two pyrimidines and back hydrogen atom transfer.
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Mehl et al. (1999) studied this question.
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