BIO 311C Chapter Notes - Chapter 15.4: Ribosomal Rna, Transfer Rna, Adenine
Document Summary
Introduction bacteria have a single rna polymerase while eukaryotes have three different in structure and function. Rna polymerase ii transcribes mrna and small nuclear rnas. Rna polymerase iii transcribes trna and small rnas that are all. Rna polymerase i promoters promoters are specific for each species lack of conserved sequences in cross-species comparisons. Rna polymerase ii promoters outdated tata hypothesis. Core promoter that can be composed of a number of distinct elements. 5" deletions have no effect on expression promoters found within the actual gene itself (most cases) The core promoter binds factors that recruit rna polymerase ii eukaryotes use lots of transcription factors transcription factors + rna polymerase ii form an initiation complex at the promoter. The transcription elongation complex can recruit other factors carboxy terminal domain (ctd) is made up of 7 amino acids repeated many times acts as a platform to recruit factors involved in elongation and. Polyadenylation is involved in terminating mrna transcripts.
