3GA9:
reference: Crystal Structure of Bacillus anthracis Transpeptidase Enzyme CapD., Wu R, Richter S, Zhang RG, Anderson VJ, Missiakas D, Joachimiak A, J Biol Chem. 2009 Jun 16. PMID: 19535342

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