RNA Ligase Enzyme (image) University of Minnesota Caption 3-D structure of the evolved enzyme (an RNA ligase), using 10 overlaid snapshots. In the top region, the overlays show the range of bending and folding flexibility in the amino acid chain that forms the molecule. The two gray balls are zinc ions. Credit University of Minnesota / Peggy Rinard Usage Restrictions With proper 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.