title: Peptide maps comparing subunits of maize chloroplast and type II nuclear DNA-dependent RNA polymerases.
abstract: Both one- and two-dimensional peptide mapping techniques have been used to compare the 180-kilodalton subunits from maize chloroplast and type II nuclear DNA-dependent RNA polymerases (nucleosidetriphosphate:RNA nucleotidyltransferase, EC 2.7.7.6). Despite their similar molecular mass, these 180-kilodalton subunits are not the same. Also, two-dimensional tryptic maps of the 160-, 43-, and 28-kilodalton polypeptides from maize type II nuclear RNA polymerase and of the 140-, 42-, and 27-kilodalton polypeptides from maize chloroplast RNA polymerase show that each of these six polypeptides is unique.
mesh_terms: D002736:Chloroplasts / Q000201:enzymology*; D012321:DNA-Directed RNA Polymerases; D046911:Macromolecular Substances; D008970:Molecular Weight; D010446:Peptide Fragments / Q000032:analysis; D010944:Plants / Q000201:enzymology; D012319:RNA Polymerase II; D003313:Zea mays / Q000201:enzymology
chemical_list: D046911:Macromolecular Substances; D010446:Peptide Fragments; D012319:RNA Polymerase II; D012321:DNA-Directed RNA Polymerases