2BVC:
reference: Structure of Mycobacterium tuberculosis glutamine synthetase in complex with a transition-state mimic provides functional insights., Krajewski WW, Jones TA, Mowbray SL, Proc Natl Acad Sci U S A. 2005 Jul 26;102(30):10499-504. Epub 2005 Jul 18. PMID: 16027359

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