1CNR:
reference: Correlated disorder of the pure Pro22/Leu25 form of crambin at 150 K refined to 1.05-A resolution., Yamano A, Teeter MM, J Biol Chem 1994 May 13;269(19):13956-65. PMID: 8188676

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