| 1A6R: reference: The unusual active site of Gal6/bleomycin hydrolase can act as a carboxypeptidase, aminopeptidase, and peptide ligase., Zheng W, Johnston SA, Joshua-Tor L, Cell 1998 Apr 3;93(1):103-9. PMID: 9546396 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).