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In Escherichia coli lack of the RecRC or RecF pathway is found to cause sensitivity to near-ultraviolet and visible light. Resistance to this light is restored in the RecBC-defective strain carrying either the sbcB (Rec+) or xonA (Rec-) mutation. The sensitivity, therefore, is not found to correlate with the degree of recombination proficiency as measured by genetic crosses.
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Gopalakrishna et al. (1976) studied this question.
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