1S1Z:
reference: Chromophore conformation and the evolution of tertiary structural changes in photoactive yellow protein., Anderson S, Srajer V, Pahl R, Rajagopal S, Schotte F, Anfinrud P, Wulff M, Moffat K, Structure (Camb) 2004 Jun;12(6):1039-45. PMID: 15274923

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