Bacterial Clock (IMAGE) University of California - San Diego Caption Circadian clock protein KaiC, at the center of the clock, controls the timing of cell division in bacterial colonies around the clock’s periphery. Credit Guogang Dong, Haitao Guo, John Buchner and Susan Golden Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.