| 3IAP: reference: Studies of Glu-416 Variants of beta-Galactosidase (E. coli) Show that the Active Site Mg(2+) is Not Important for Structure and Indicate that the Main Role of Mg (2+) is to Mediate Optimization of Active Site Chemistry., Lo S, Dugdale ML, Jeerh N, Ku T, Roth NJ, Huber RE, Protein J. 2009 Nov 21. PMID: 19936901 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).