New Messenger RNA Discovered (IMAGE) University of Chicago Caption The discovery of a new messenger RNA (mRNA) modification m1A and its distinct location in mammalian mRNA, together with previously known mRNA modifications, strongly suggest the presence of 'epitranscriptome code' in controlling gene expression. This diagram of an RNA molecule shows the spot where the CH3 methyl group is added for an N1 methylation, which adds a positive charge. Credit Chuan He/University of Chicago Usage Restrictions News organizations may use this image in connection with reports about the research of Chuan He and his associates. 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.