4O6Y:
reference: Structure and mechanism of a eukaryotic transmembrane ascorbate-dependent oxidoreductase., Lu P, Ma D, Yan C, Gong X, Du M, Shi Y, Proc Natl Acad Sci U S A. 2014 Jan 21. PMID: 24449903

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