1IBS:
reference: Binding of cations in Bacillus subtilis phosphoribosyldiphosphate synthetase and their role in catalysis., Eriksen TA, Kadziola A, Larsen S, Protein Sci 2002 Feb;11(2):271-9. PMID: 11790837

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