13. After binding to the activating ligand, cholecalciferol receptor performs an impressive array of functions. Which of the following events is not associated with cholecalciferol receptor activation? (A) The receptors are in the nucleus. (B) The receptors will be tyrosine-phosphorylated. (C) The receptors could bind to DNA and regulating gene expression. (D) Activated PPAR will associate with other cofactor/transcription factor. (E) The receptors will dimerize with RXR and illicit signal transduction.