3DOP:
reference: Structure and catalytic mechanism of human steroid 5beta-reductase (AKR1D1)., Di Costanzo L, Drury JE, Christianson DW, Penning TM, Mol Cell Endocrinol. 2008 Sep 19. PMID: 18848863

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