3H90:
reference: Structural basis for autoregulation of the zinc transporter YiiP., Lu M, Chai J, Fu D, Nat Struct Mol Biol. 2009 Oct;16(10):1063-7. Epub 2009 Sep 13. PMID: 19749753

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