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Substrate Specificity of AtPUP1 (in MG887-1) and ScFCY2 (Strain 1278b).
Specificity was determined by competition for uptake of 14C-adenine (25 μM) with a 10-fold molar excess of nucleic acid bases, nucleosides, nucleotides, and derivatives. Data represent the mean of three independent experiments ±sd. Comparable results were obtained when 14C-cytosine was used as the substrate.
