title: Initiation by Escherichia coli RNA-polymerase: transformation of abortive to productive complex.
mesh_terms: D001483:Base Sequence; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism*; D004926:Escherichia coli / Q000201:enzymology*; D012329:RNA, Bacterial / Q000096:biosynthesis; D012265:Ribonucleotides; D014158:Transcription, Genetic
chemical_list: D012329:RNA, Bacterial; D012265:Ribonucleotides; D012321:DNA-Directed RNA Polymerases