label: DNA-directed 5'-3' RNA polymerase activity
label_lc: dna-directed 5'-3' rna polymerase activity
description: "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'."