1U3C:
reference: Structure of the photolyase-like domain of cryptochrome 1 from Arabidopsis thaliana., Brautigam CA, Smith BS, Ma Z, Palnitkar M, Tomchick DR, Machius M, Deisenhofer J, Proc Natl Acad Sci U S A 2004 Aug 17;101(33):12142-7. Epub 2004 Aug 6. PMID: 15299148

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