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 transposon’s 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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This note was uploaded on 03/03/2008 for the course BIO G 102 taught by Professor Walcott during the Spring '08 term at Cornell.

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

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