KaiC with ATP/Phosphorylation Sites (IMAGE) Vanderbilt University Caption This illustration of KaiC shows the sites where ATP molecules (shown in green) attach and the location of the phosphorylation sites (shown in red). Credit Carl Johnson Laboratory 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.