1AJN:
reference: Ligand-induced conformational change in penicillin acylase., Done SH, Brannigan JA, Moody PC, Hubbard RE, J Mol Biol 1998 Nov 27;284(2):463-75. PMID: 9813130

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