3LO7:
reference: Unusual Conformation of the SxN Motif in the Crystal Structure of Penicillin-Binding Protein A from Mycobacterium tuberculosis., Fedarovich A, Nicholas RA, Davies C, J Mol Biol. 2010 Mar 3. PMID: 20206184

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