22 - Each gene has its own promoter and transcription...

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Bio 22/02/2008 10:26:00 DNa 2NM DNa and histone 10 NM Nucleosomes Condensed chromosomes 300 um Heterchromatin – condensed Cannot be transcribed Euchromatiu – less compact Can be transcribed PROKARYOTES Most DNA codes for protein Some regulat Coding sequence does from to to finish without interruption Blodrue pathway o All gous tend to has adjacent unit Eukaryotes Most DNA does not code for protein o 97% DNA does NOT total a unt DNA 1000 times that of prokayotes have cell differentiation o +/- 200 different cell types Typical cell suppresses 20% of its genes 1.5% DNA codes for protein Acetylate Histones COCH3 tails DNA  methylation
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CH3 – DNA Unable to be transcribed Inactive Genetic imprinting Epigenetic Inheritance – inheritance of train not directly involving the nucleotide  sequence Fig 19.6 – structure of eukaryotic gene Transcription initiation complex
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Unformatted text preview: Each gene has its own promoter and transcription factor. Much more flexibility Specific control elements o Can activate more than one Differences in degradation of DNA mDNA Prok last minutes Euk min hours or days Protein factors which bind to the mRNA which prevent transcription Micro RNA small piece of RNA which are chewed off larger RNA Able to bind with protein complex Protein made Target is for destruction ubiquitin The longer RNA last the more protein that can be made Transposons Two different kinds o Copied DNA then inserts on chromosomes (viruses) o Retro transposons generates RNA transcrpt (revers transcriptate) makes DNA copy then inserts somewhere else in the genome (like retro viruses) 22/02/2008 10:26:00 22/02/2008 10:26:00...
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22 - Each gene has its own promoter and transcription...

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