You identify a disease of epidermal cells in mice in which Gene A is not expressed. Further analyses reveals that the sequence of Gene A in affected and normal mice is the SAME. Which of the choices below could explain why Gene A is NOT expressed in the epidermal cells of the affected mice. Select all that apply. A. Lysine residues are acetylated in Histone tails close to Gene A in affected mice. B. Tyrosine residues are phosphorylated in Histone tails close to Gene A in affected mice. C. Epidermal cells of affected mice lack the transcription factors associated with Gene A. D. DNA in the promoter region of Gene A of affected mice is methylated.

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