Messenger RNAs (image) Indiana University Caption Messenger were RNAs charted, with A's and I's representing specific nucleotides. ADR-1 does not alter editing activity of ADR-2 at all of the hundreds of newly found editing sites, but the ability of ADR-1 to bind to these mRNAs is required for its regulatory activity at the majority of ADR-1 affected editing sites. Credit CHART BY HEATHER A. HUNDLEY, GENE YEO AND MICHAEL C. WASHBURN Usage Restrictions None 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.