ACETYLATION and METHYLATION

chemical tags (methyl can turn genes on and off) and acetyl respond to environmental changes .This can link to epigentetics:

• what is epigenetics? epigenetics involve heritable chnages in gene function without changes to the base sequence. These chnages are caused by the chnages in the environment that inhibit trabscription by: inc methylation of DNA or decrease acetylation of associated histones. 

ACETYLATION: acetyl group is transferred to a molecule 

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