5FC9:
reference: A Purple Cupredoxin from Nitrosopumilus maritimus Containing a Mononuclear Type 1 Copper Center with an Open Binding Site., Hosseinzadeh P, Tian S, Marshall NM, Hemp J, Mullen T, Nilges MJ, Gao YG, Robinson H, Stahl DA, Gennis RB, Lu Y, J Am Chem Soc. 2016 May 12. PMID: 27120678

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