Means of Directing Protein Synthesis (IMAGE) Lomonosov Moscow State University Caption Leaderless mRNA is capable of directing protein synthesis in human cells by any of four possible means. Credit Sergey Dmitriev Usage Restrictions Credit: Sergey Dmitriev 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.