Enzymes that catalyze DNA template-directed extension of the 3'-end of an RNA strand one nucleotide at a time. They can initiate a chain de novo. In eukaryotes, three forms of the enzyme have been distinguished on the basis of sensitivity to alpha-amanitin, and the type of RNA synthesized. (From Enzyme Nomenclature, 1992).
Also Known As:
RNA Polymerase; Transcriptase; DNA-Directed RNA Polymerase; Polymerase, RNA; DNA Dependent RNA Polymerases; DNA Directed RNA Polymerase; DNA Directed RNA Polymerases; Polymerase, DNA-Directed RNA; Polymerases, DNA-Dependent RNA; Polymerases, DNA-Directed RNA; Polymerases, RNA; RNA Polymerase, DNA-Directed; RNA Polymerases, DNA-Dependent; RNA Polymerases, DNA-Directed; DNA-Dependent RNA Polymerases; RNA Polymerases; Transcriptases; Nucleoside-triphosphate:RNA nucleotidyltransferase (DNA-directed)