1H4P:
reference: The ER protein folding sensor UDP-glucose glycoprotein-glucosyltransferase modifies substrates distant to local changes in glycoprotein conformation., Taylor SC, Ferguson AD, Bergeron JJ, Thomas DY, Nat Struct Mol Biol 2004 Feb;11(2):128-34. Epub 2004 Jan 4. PMID: 14730348

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