1VMO:
reference: Crystal structure of vitelline membrane outer layer protein I (VMO-I): a folding motif with homologous Greek key structures related by an internal three-fold symmetry., Shimizu T, Vassylyev DG, Kido S, Doi Y, Morikawa K, EMBO J 1994 Mar 1;13(5):1003-10. PMID: 8131734

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