3LS3:
reference: Molecular basis of the light-driven switching of the photochromic fluorescent protein Padron., Brakemann T, Weber G, Andresen M, Groenhof G, Stiel AC, Trowitzsch S, Eggeling C, Grubmueller H, Hell SW, Wahl MC, Jakobs S, J Biol Chem. 2010 Mar 16. PMID: 20236929

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