title: Non-processive transcription of poly[d(A-T)] by wheat germ RNA polymerase II.
abstract: RNA product distribution obtained during the transcription of poly[d(A-T)] by wheat germ RNA polymerase IIA under various experimental conditions was analyzed by high resolution polyacrylamide gel electrophoresis. Poly[r(A-U)] synthesis proceeded as if wheat germ RNA polymerase II was a non-processive enzyme: a ladder of RNA products of increasing lengths was obtained, which apparently, terminated at every other nucleotide. RNA release was not dependent upon nucleoside triphosphate substrate concentrations. A likely explanation would be that ternary complexes enzyme: DNA: RNA were very much unstable; moreover, oligonucleotides released were not re-used for further elongation by the enzyme.
mesh_terms: D012321:DNA-Directed RNA Polymerases / Q000378:metabolism*; D007700:Kinetics; D010944:Plants / Q000201:enzymology*; D011067:Poly dA-dT / Q000235:genetics*; D011089:Polydeoxyribonucleotides / Q000235:genetics*; D012319:RNA Polymerase II / Q000378:metabolism*; D014158:Transcription, Genetic; D014908:Triticum / Q000201:enzymology
chemical_list: D011089:Polydeoxyribonucleotides; D011067:Poly dA-dT; D012319:RNA Polymerase II; D012321:DNA-Directed RNA Polymerases