Biology 1201A Chapter Notes - Chapter 2: Lac Repressor, Helix-Turn-Helix, Lac Operon
14 Mar 2016
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It is just before the promoter. termination of eukaryotic transcription: rna polymerase transcribes the clipping sequence, polyadenylation signal, cute it by. Rnase, then poly a tail added to end. operons are triggered by the presence or absence of de-acetylation is chromatin remodeling so it is transcriptional regulation. It is allowing for a promoter to be more active. Rna transcript is made, soon after rna polymerase goes over, 5" cap is added, polyadenylation signal is in themrna, recognized by rna. Rnase cute it, adds polya tail, introns are removed by snrps; snrna cuts and loops the intron out. The -# tells is what direction to go. Operons aren"t epigenetic. acetylation is increasing transcription. methylation decreases expression of a gene. Acetylation is increase of gene expression. xist and tsix are antiparallell to each their and are anti-sense. If you have paternal gene expressed then tsix is present in that one and xist is present in the maternal.
