3DJ4:
reference: PknB-mediated phosphorylation of a novel substrate, N-acetylglucosamine-1-phosphate uridyltransferase, modulates its acetyltransferase activity., Parikh A, Verma SK, Khan S, Prakash B, Nandicoori VK, J Mol Biol. 2009 Feb 20;386(2):451-64. Epub 2008 Dec 24. PMID: 19121323

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