| 4G01: reference: Direct metal recognition by guanine nucleotide-exchange factor in the initial step of the exchange reaction., Uejima T, Ihara K, Sunada M, Kawasaki M, Ueda T, Kato R, Nakano A, Wakatsuki S, Acta Crystallogr D Biol Crystallogr. 2013 Mar;69(Pt 3):345-51. doi:, 10.1107/S0907444912047294. Epub 2013 Feb 16. PMID: 23519409 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).