General Medicine General ecb1550e Signal pathways activate transcription factors for their transpo into the nucleus by all except A Detachment of the transcription factor from a complexing protein can unmask a nuclear localisation signal B Phosphorylation of impoin protein increases its binding affinity for transcription factors C Phosphorylation of the transcription factor can increase its impoin binding affinity D Dephosphorylation of the transcription factor can increase its impoin binding affinity