BIO206H5 Study Guide - Midterm Guide: Start Codon, Consensus Sequence, Prokaryote
Document Summary
The end of 3" doesn"t have end sequence however, it has a signal which signals for trimming and polya addition. This is recognized by the cstt and cpsf proteins. Once these signals are reached, the rna is cut and its released. Also, at the same time snrnp u1 binds at 5" splice site. Followed by the 3" splice site cleaves and joins the two exon sequence: rna pol helps in this process by making the ctd (c- Terminal domain) recruit all the different protein complexes and processing the rna as its being produced by the rna pol. Thus, rna holoenzyme not only transcribes the rna also assist with the processing of rna. It is possible to join exons at different patterns, thus allowing the gene to make many different gene: alternative splice works since we don"t need to splice every exon together, the processed mrna can be exported to cytoplasm. For the exit through nucleus, its necessary to have capp-
