4AYJ:
reference: Structure of a metal-independent bacterial glycosyltransferase that catalyzes the synthesis of histo-blood group A antigen., Thiyagarajan N, Pham TT, Stinson B, Sundriyal A, Tumbale P, Lizotte-Waniewski M, Brew K, Acharya KR, Sci Rep. 2012;2:940. doi: 10.1038/srep00940. Epub 2012 Dec 7. PMID: 23230506

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