| 1C1S: reference: Recruiting Zn2+ to mediate potent, specific inhibition of serine proteases., Katz BA, Luong C, J Mol Biol. 1999 Sep 24;292(3):669-84. PMID: 10497030 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).