1RAV:
reference: Biochemical characterization and crystal structure of a recombinant hen avidin and its acidic mutant expressed in Escherichia coli., Nardone E, Rosano C, Santambrogio P, Curnis F, Corti A, Magni F, Siccardi AG, Paganelli G, Losso R, Apreda B, Bolognesi M, Sidoli A, Arosio P, Eur J Biochem 1998 Sep 1;256(2):453-60. PMID: 9760187

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