2BLM:
reference: Beta-lactamase of Bacillus licheniformis 749/C at 2 A resolution., Moews PC, Knox JR, Dideberg O, Charlier P, Frere JM, Proteins 1990;7(2):156-71. PMID: 2326252

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