2G3O:
reference: The 2.1A crystal structure of copGFP, a representative member of the copepod clade within the green fluorescent protein superfamily., Wilmann PG, Battad J, Petersen J, Wilce MC, Dove S, Devenish RJ, Prescott M, Rossjohn J, J Mol Biol. 2006 Jun 16;359(4):890-900. Epub 2006 Apr 25. PMID: 16697009

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