5DQR:
reference: Crystal Structure and Catalytic Mechanism of 7-Hydroxymethyl Chlorophyll a Reductase., Wang X, Liu L, J Biol Chem. 2016 Jun 17;291(25):13349-59. doi: 10.1074/jbc.M116.720342. Epub, 2016 Apr 12. PMID: 27072131

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