?:definition
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Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template, i.e. the catalysis of DNA-template-directed extension of the 3\'-end of an RNA strand by one nucleotide at a time. Can initiate a chain \'de novo\'. [EC:2.7.7.6, GOC:pf]
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