1LEO:
reference: Nucleoside diphosphate kinase. Investigation of the intersubunit contacts by site-directed mutagenesis and crystallography., Karlsson A, Mesnildrey S, Xu Y, Morera S, Janin J, Veron M, J Biol Chem 1996 Aug 16;271(33):19928-34. PMID: 8702707

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).