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. 2002 Jun;184(11):2878–2888. doi: 10.1128/JB.184.11.2878-2888.2002

FIG. 3.

FIG. 3.

The magnesium optimum is determined by the total nucleotide substrate concentration. The MgCl2 concentration (abscissa) was varied at total nucleotide substrate concentrations of either 12 or 4 mM and a fixed ATP/GTP ratio of 1:3.