Estrogen Receptor and Calmodulin Structure (image) University of California - Davis Share Print E-Mail Caption This three-dimensional structure shows how calmodulin (yellow) binds two estrogen receptors (blue, pink) together. This lets the receptor respond to estrogen by attaching to DNA. Credit James Ames, UC Davis Usage Restrictions May be used with acknowledgment of the source. Share Print E-Mail 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.