3H1O:
reference: Rotational order-disorder structure of fluorescent protein FP480., Pletnev S, Morozova KS, Verkhusha VV, Dauter Z, Acta Crystallogr D Biol Crystallogr. 2009 Sep;65(Pt 9):906-12. Epub 2009, Aug 6. PMID: 19690368

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