Cyclic Hexapeptide (image) Technical University of Munich (TUM) Share Print E-Mail Caption Cyclic hexapeptide in its bioactive form with the integrin-binding tripeptide sequence arginine-glycine-aspartic acid: Green spheres represent carbon atoms, red oxygen atoms, blue nitrogen atoms and white hydrogen atoms. Yellow spheres represent the two N-methyl groups and dashed orange lines show the two intramolecular hydrogen bonds. Arrangement (clockwise): arginine (top), glycine, aspartic acid, alanine, N-methylated alanine, N-methylated D-valine. Credit Michael Weinmueller / TUM Usage Restrictions None Share Print E-Mail 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.