4Q0H:
reference: Crystallographic and Electron Microscopic Analyses of a Bacterial Phytochrome Reveal Local and Global Rearrangements During Photoconversion., Burgie ES, Wang T, Bussell AN, Walker JM, Li H, Vierstra RD, J Biol Chem. 2014 Jul 8. pii: jbc.M114.571661. PMID: 25006244

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