ID   2.7.6.4
DE   nucleotide diphosphokinase.
AN   nucleotide pyrophosphokinase.
CA   a nucleoside 5'-phosphate + ATP = a 5'-phosphonucleoside 3'-diphosphate +
CA   AMP + H(+).
CC   -!- Acts on the 5'-mono-, di- and triphosphate derivatives of purine
CC       nucleosides.
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