4BJP:
reference: Crystal Structure of Penicillin-Binding Protein 3 (PBP3) from Escherichia coli., Sauvage E, Derouaux A, Fraipont C, Joris M, Herman R, Rocaboy M, Schloesser M, Dumas J, Kerff F, Nguyen-Disteche M, Charlier P, PLoS One. 2014 May 29;9(5):e98042. doi: 10.1371/journal.pone.0098042. eCollection, 2014. PMID: 24875494

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