1ALQ:
reference: Circularly permuted beta-lactamase from Staphylococcus aureus PC1., Pieper U, Hayakawa K, Li Z, Herzberg O, Biochemistry 1997 Jul 22;36(29):8767-74. PMID: 9220963

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