A novel mutation in kaiC affects resetting of the cyanobacterial circadian clock.

Abstract excerpt

Light is the most important factor controlling circadian systems in response to day-night cycles. In order to better understand the regulation of circadian rhythms by light in Synechococcus elongatus PCC 7942, we screened for mutants with defective phase shifting in response to dark pulses. Using a 5-h dark-pulse protocol, we identified a mutation in kaiC that we termed pr1, for phase response 1. In the pr1...

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