1HL7:
reference: The crystal structure of a (-) gamma-lactamase from an Aureobacterium species reveals a tetrahedral intermediate in the active site., Line K, Isupov MN, Littlechild JA, J Mol Biol. 2004 Apr 30;338(3):519-32. PMID: 15081810

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