Biology 1002B Lecture Notes - Lecture 12: Histone H1, Chromatin Remodeling, Start Codon
28 Feb 2016
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Document Summary
Material covered dna codes for proteins, transcription, mrna. Many similarities between dna replication and transcription keep them separate. We generally think of transcription as the first step in protein production. Functional products of transcription also include rna molecules. Histone tails are sites of chemical modification. Densely packed with proteins (silent) , inactive in females. Each step in arginine synthesis controlled by a gene for the required enzyme. Gene region of dna which is transcribed region of dna required for transcription. Gene transcription is a highly regulated process genes only turned on when necessary. Rna polymerase synthesizes rna 5" to 3". Mrna is identical to non-template (u in place of t) Only 1 strand acts as a template. Only a part of the dna molecule serves as a template. Attachment for poly(a) polymerase adds poly(a) tail. Small nuclear rna associate with proteins snrnp associate in a spliceosome (sequence specific), cuts mrna releasing intron joins exons 1 and 2.
