5AZU:
reference: Crystal structure analysis of oxidized Pseudomonas aeruginosa azurin at pH 5.5 and pH 9.0. A pH-induced conformational transition involves a peptide bond flip., Nar H, Messerschmidt A, Huber R, van de Kamp M, Canters GW, J Mol Biol 1991 Oct 5;221(3):765-72. PMID: 1942029

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