5HFI:
reference: Crystal structures of the disulfide reductase DsbM from Pseudomonas aeruginosa., Jo I, Park N, Chung IY, Cho YH, Ha NC, Acta Crystallogr D Struct Biol. 2016 Oct 1;72(Pt 10):1100-1109. Epub 2016 Sep 15. PMID: 27710931

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