Reaction catalyzed by hydroxymethylpyrimidine kinase (2.7.1.49), phosphooxymethylpyrimidine kinase (2.7.4.7)

	ATP	+			=		ADP	+
	ATP	+		2-methyl-4-amino-5-phosphomethylpyrimidine	=		ADP	+		2-methyl-4-amino-5-diphosphomethylpyrimidine