5EPO:
reference: The three-dimensional structure of Clostridium absonum 7alpha-hydroxysteroid dehydrogenase: new insights into the conserved arginines for NADP(H) recognition., Lou D, Wang B, Tan J, Zhu L, Cen X, Ji Q, Wang Y, Sci Rep. 2016 Mar 10;6:22885. doi: 10.1038/srep22885. PMID: 26961171

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