| 1TWX: reference: Crystal structure of the thrombin mutant D221A/D222K: the Asp222:Arg187 ion-pair stabilizes the fast form., Pineda AO, Zhang E, Guinto ER, Savvides SN, Tulinsky A, Di Cera E, Biophys Chem 2004 Dec 20;112(2-3):253-6. PMID: 15572256 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).