3GA4:
reference: Oxidoreductase activity of oligosaccharyltransferase subunits Ost3p and Ost6p defines site-specific glycosylation efficiency., Schulz BL, Stirnimann CU, Grimshaw JP, Brozzo MS, Fritsch F, Mohorko E, Capitani G, Glockshuber R, Grutter MG, Aebi M, Proc Natl Acad Sci U S A. 2009 Jul 7;106(27):11061-6. Epub 2009 Jun 23. PMID: 19549845

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