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FEMS Microbiol Lett. 2000 Aug 15;189(2):129-33.

Genes controlling circadian rhythm are widely distributed in cyanobacteria.

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TerraGen Discovery Inc., Suite 300-2386 East Mall-UBC, Vancouver, B.C., Canada V6T 1Z3.


The kaiABC gene cluster is important for maintaining circadian rhythms in the cyanobacterium Synechococcus PCC 7942. An extensive PCR-based survey of phylogenetically diverse cyanobacteria was conducted using degenerate primers designed to identify the presence of the kaiC gene. Hybridization and sequence analyses showed that the observed amplification products had a high degree of similarity to kaiC. Forty cyanobacterial strains possessed kaiC related sequences, suggesting that a clock system is universal among cyanobacteria.

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