3FHK:
reference: Structure and Function of Bacillus subtilis YphP, a Prokaryotic Disulfide Isomerase with a CXC Catalytic Motif (,)., Derewenda U, Boczek T, Gorres KL, Yu M, Hung LW, Cooper D, Joachimiak A, Raines RT, Derewenda ZS, Biochemistry. 2009 Aug 21. PMID: 19653655

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