Molecular Switch (IMAGE) Helmholtz Association Caption This shows the structure of the calcium pump switch in cells of the plant thale cress (Arabidopsis thaliana). Credit Henning Tidow et al.; University of Aarhus Usage Restrictions Free to use by the media when reporting about the corresponding paper. 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.