3VSL:
reference: Crystal Structures of Penicillin-Binding Protein 3 (PBP3) from Methicillin-Resistant Staphylococcus aureus in the Apo and Cefotaxime-Bound Forms., Yoshida H, Kawai F, Obayashi E, Akashi S, Roper DI, Tame JR, Park SY, J Mol Biol. 2012 Oct 26;423(3):351-64. doi: 10.1016/j.jmb.2012.07.012. Epub 2012 , Jul 27. PMID: 22846910

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