第五章DNA转录DNAtranscription(RNASynthesis)5.1转录的基本概念5.2转录的特点5.3RNA聚合酶5.4转录过程5.5转录后加工5.6逆转录细胞核细胞质转录5.1转录的基本概念转录(transcription)是遗传信息从DNA转变为RNA的过程。即以双链DNA中的确定的一条链(模板链用于转录,编码链不用于转录)为模板,以A,U,C,G四种核糖核苷酸为原料,在RNA聚合酶催化下合成RNA的过程。nonsensestrandCoding(sensestrand)转录仅以DNA的一条链作为模...
Chapter3transcriptioninProkaryotes:MechanismandRegulation原核生物转录:机理与调控PromotersRNAPolymerasetranscriptionmechanisminthreephasesMechanismoftranscriptionRegulationofgeneexpressioninprokayotesTheLacoperonWhyuseandRNAintermediate?TheTrpoperonMainPoints§1WhyuseanRNAintermediate?(为什么使用RNA作为中间物)Chromosomesarelargeandcomplex染色体庞大又复杂Chromosomesarelargeandc...
Chapter3transcriptioninProkaryotes:MechanismandRegulation原核生物转录:机理与调控PromotersRNAPolymerasetranscriptionmechanisminthreephasesMechanismoftranscriptionRegulationofgeneexpressioninprokayotesTheLacoperonWhyuseandRNAintermediate?TheTrpoperonMainPoints§1WhyuseanRNAintermediate?(为什么使用RNA作为中间物)Chromosomesarelargeandcomplex染色体庞大又复杂Chromosomesarelargeandc...