2RMI:
reference: Astressin-amide and astressin-acid are structurally different in dimethylsulfoxide., Grace CR, Cervini L, Gulyas J, Rivier J, Riek R, Biopolymers. 2007 Oct 5-15;87(2-3):196-205. PMID: 17657708

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).