?:definition
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OBSOLETE. Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains a plastid PEP-A RNA polymerase II specific promoter to direct initiation and catalyses DNA-template-directed extension of the 3\'-end of an RNA strand by one nucleotide at a time. Can initiate a chain \'de novo\'. [GOC:txnOH, PMID:20701995]
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