3FSN:
reference: Crystal structure of native RPE65, the retinoid isomerase of the visual cycle., Kiser PD, Golczak M, Lodowski DT, Chance MR, Palczewski K, Proc Natl Acad Sci U S A. 2009 Oct 13;106(41):17325-30. Epub 2009 Oct 5. PMID: 19805034

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