2. Which description is incorrect to transcription factors?
(A) A transcription factor contains DNA binding domain and transactivation domain.
(B) An acidic domain is a DNA binding domain.
(C) A proline-rich domain is a transactivation domain
(D) The hydroxylation in the proline residue of the transcription factor HIF-1α leads to protein degradation.
(E) The leucine-zipper is a domain for dimer formation.