1UIS:
reference: The 2.0-A crystal structure of eqFP611, a far red fluorescent protein from the sea anemone Entacmaea quadricolor., Petersen J, Wilmann PG, Beddoe T, Oakley AJ, Devenish RJ, Prescott M, Rossjohn J, J Biol Chem 2003 Nov 7;278(45):44626-31. Epub 2003 Aug 8. PMID: 12909624

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