1YHH:
reference: Understanding GFP Chromophore Biosynthesis: Controlling Backbone Cyclization and Modifying Post-translational Chemistry(,)., Barondeau DP, Kassmann CJ, Tainer JA, Getzoff ED, Biochemistry 2005 Feb 15;44(6):1960-70. PMID: 15697221

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