Alternative Splicing Variants (IMAGE) University of Vienna Caption Alternative splicing variants of the enzyme CaMKII make the circadian clock tick faster or slower. Crystal structure of a tetradecameric assembly of the association domain of Ca2+/calmodulin-dependent kinase II. Credit Copyright: Birgit Pöhn Usage Restrictions The image may only be used with appropriate caption or credit. 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.