Termination a After the polymerase transcribes the length of the gene (or genes), it will stop and release the RNa transcript. ■工 n some cells, termination occurs at the specific and well defined DNA sequences called terminators some cells lack such termination sequences
26 Termination ◼ After the polymerase transcribes the length of the gene (or genes), it will stop and release the RNA transcript. ◼ In some cells, termination occurs at the specific and welldefined DNA sequences called terminators. Some cells lack such termination sequences
Fig 12-3-Elongation and termination elongation Elongation s Termination RNA olymerase terminates. and releases RNA 27
27 Fig 12-3-Elongation and termination Termination Elongation
CHHAPTER12: Mechanisms of transcription Topic 2 The transcription cycle in bacteria 28
28 Topic 2 The transcription cycle in bacteria CHAPTER12: Mechanisms of Transcription
1 2-1 Bacterial promoters o vary in strength and 9 Sequences, but have a certain defining features oo0550003 29
29 2-1 Bacterial promoters vary in strength and sequences, but have certain defining features The transcription cycle in bacteria
Holoenzyme= o factor t core enzyme Figure 12-4 In cell, rna polymerase initiates transcription only at promoters Who confers the polymerase binding specificity?
30 Figure 12-4 , Holoenzyme= factor + core enzyme In cell, RNA polymerase initiates transcription only at promoters. Who confers the polymerase binding specificity?