| 4PQG: reference: Structure of a Novel O-Linked N-Acetyl-d-glucosamine (O-GlcNAc) Transferase, GtfA, Reveals Insights into the Glycosylation of Pneumococcal Serine-rich Repeat Adhesins., Shi WW, Jiang YL, Zhu F, Yang YH, Shao QY, Yang HB, Ren YM, Wu H, Chen Y, Zhou CZ, J Biol Chem. 2014 Jul 25;289(30):20898-20907. Epub 2014 Jun 16. PMID: 24936067 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).