1CPM:
reference: Native-like in vivo folding of a circularly permuted jellyroll protein shown by crystal structure analysis., Hahn M, Piotukh K, Borriss R, Heinemann U, Proc Natl Acad Sci U S A 1994 Oct 25;91(22):10417-21. PMID: 7937966

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