Cytosine deaminationoccurs ~100 cytosinesper genome per day in a human genome. Eukaryotic cells also contain residues of 5’-methylcytosine, which is involved in regulating gene transcription rates. Mutation of 5’-methylcytosine by deaminationconverts it to thymine. This presents the cell with a much more severe problem than normal cytosine deaminationof cytosine to uracil. Why?

Biochemistry
6th Edition
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Reginald H. Garrett, Charles M. Grisham
Chapter29: Transcription And The Regulation Of Gene Expression
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Cytosine deaminationoccurs ~100 cytosinesper genome per day in a human genome. 

Eukaryotic cells also contain residues of 5’-methylcytosine, which is involved in regulating gene transcription rates. 

Mutation of 5’-methylcytosine by deaminationconverts it to thymine.  This presents the cell with a much more severe problem than normal cytosine deaminationof cytosine to uracil. Why?

 

 

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