3ZUX:
reference: Crystal structure of a bacterial homologue of the bile acid sodium symporter ASBT., Hu NJ, Iwata S, Cameron AD, Drew D, Nature. 2011 Oct 5;478(7369):408-11. doi: 10.1038/nature10450. PMID: 21976025

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