| 1PNK: reference: Penicillin acylase has a single-amino-acid catalytic centre., Duggleby HJ, Tolley SP, Hill CP, Dodson EJ, Dodson G, Moody PC, Nature 1995 Jan 19;373(6511):264-8. PMID: 7816145 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).