Fig.1 (IMAGE) Osaka University Caption The proximal segment of the epididymis responds to the switch factor NELL2 and synthesizes OVCH2 (magenta), a protein indispensable for sperm maturation. Credit Osaka University 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.