This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'BRD4 is required for stimulating kinase activity of \nSelect and explain. \nA. P-TEFB, B. HEXIMI, C. HOX-B, D. TSKsnRNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A P-TEFBBromodomain-containing protein 4 is a protein that in humans is encoded by the BRD4 gene.The C-terminal domain of BkD4 has been implicated in promoting gene transcription through interaction with the transcription elongation factor P-TEFb.', 'role': 'assistant'}]