40. Enzymes that acetylate the s-amino group of lysine in the histidine tails are called_____and are involved in________. 
(A) histone deacetylases; restoring chromatin to a repressed state
(B) histone acety1transferases (HATs); initial events in transcriptional activation
(C) histone activases; formation of the de-repression complex
(D) Schiff base formation; promoting the formation of closed complexes
(E) None of the above 

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#6570867
破題   這題要求填空,描述在組蛋白尾...
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#6038980
 Enzymes that acetyl...
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