Peptide Chains (IMAGE) Arizona State University Caption Peptide chains composed of 20 amino acids (green) hold an enzyme in its proper orientation on a glass slide, permitting high-efficiency catalysis. Credit The Biodesign Institute Arizona State University Usage Restrictions None 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.