The Research in a Nutshell (video) Washington University in St. Louis Loading video... Caption Ben-Shahar describes research with fruit flies that shows messenger RNA plays an active as well as a passive role in the cell. In addition to encoding for a protein, it can mark other mRNAs for destruction, preventing them from making the proteins they code for. Credit Yehuda Ben-Shahar, Susanne DiSalvo, James Byard and Tom Malcowicz/WUSTL Usage Restrictions Please credit 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.