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Nucleoside diphosphate kinase was a predominantly soluble enzyme in lily pollen (Lilium longiflorum, var. Ace), and very little enzyme activity was associated with the mitochondrial fraction. GTP was the preferred substrate when ADP was the second substrate. The enzyme was purified 18-fold to a specific activity of 7 μmoles/min/mg protein.
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Dickinson et al. (1971) studied this question.
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