1EQ0:
reference: Unusual conformational changes in 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase as revealed by X-ray crystallography and NMR., Xiao B, Shi G, Gao J, Blaszczyk J, Liu Q, Ji X, Yan H, J Biol Chem 2001 Oct 26;276(43):40274-81. PMID: 11546767

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