1NDH:
reference: Crystal structure of NADH-cytochrome b5 reductase from pig liver at 2.4 A resolution., Nishida H, Inaka K, Yamanaka M, Kaida S, Kobayashi K, Miki K, Biochemistry 1995 Mar 7;34(9):2763-7. PMID: 7893687

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