4MLP:
reference: Crystal structure of mammalian cryptochrome in complex with a small molecule competitor of its ubiquitin ligase., Nangle S, Xing W, Zheng N, Cell Res. 2013 Oct 1. doi: 10.1038/cr.2013.136. PMID: 24080726

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