ELVA in mouse oocyte (IMAGE) Center for Genomic Regulation Caption ELVA (magenta) pictured inside a mouse oocyte. Credit Gabriele Zaffagnini/Centro de Regulación Genómica Usage Restrictions Credit must be given to the creator. License CC BY 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.