title: [Degradation of ribosomal RNA from Escherichia coli by ribonuclease U2 and in vitro transcription of "RNA-fragments" into complementary DNA].
abstract: Under well defined conditions ribosomal RNAs purified from Escherichia coli can be degraded by ribonuclease U2 giving rise to RNA fragments of 60--70 nucleotides. In vitro, these fragments are efficiently transcribed into a complementary DNA by DNA polymerase RNA dependent, partially purified from extracts of E. coli. In vivo, "RNA-fragments-U2" inhibit the development of plant tumors.
mesh_terms: D000818:Animals; D004269:DNA, Bacterial / Q000096:biosynthesis; D004926:Escherichia coli / Q000201:enzymology; D066298:In Vitro Techniques; D012329:RNA, Bacterial / Q000378:metabolism*; D012335:RNA, Ribosomal / Q000378:metabolism*; D012194:RNA-Directed DNA Polymerase; D012260:Ribonucleases / Q000378:metabolism*; D014158:Transcription, Genetic
chemical_list: D004269:DNA, Bacterial; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D012194:RNA-Directed DNA Polymerase; D012260:Ribonucleases
vernacular_title: Découpage des ARN ribosomiques d'Escherichia coli par la ribonucléase U2 et transcription in vitro des "ARN-fragments" en ADN complémentaire.