Crystal Structure (IMAGE) Karolinska Institutet Caption This image shows the crystal structure of the complex between a domain repeat of egg coat protein VERL (dark pink) and cognate sperm protein lysin (blue). Credit Artwork by Isha Raj and Luca Jovine. Usage Restrictions The image may only be used in connection to reports about this study. 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.