6Y9B:
reference: Cryo-EM structure and potential enzymatic function of human six-transmembrane epithelial antigen of the prostate 1., Oosterheert W, Gros P, J Biol Chem. 2020 May 14. pii: RA120.013690. doi: 10.1074/jbc.RA120.013690. PMID: 32409586

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