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: Biochemistry
[{'content': 'Sequence which is responsible for retaining proteins in membrane \nSelect and explain. \nA. Translocon, B. Sec 61 complex, C. Docking protein, D. Halt signal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Halt signal', 'role': 'assistant'}]