In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
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Question:  The aromatic hydrocarbon receptor ( AHR ) is a ligand - activated transcription factor that regulates the expression of several drug - metabolizing enzymes and has been implicated in immunosuppression , teratogenesis , cell - specific hyperplasia , and certain types of malignancies and toxicities .

Answer: aromatic hydrocarbon receptor


Question:  Liver disease and HCV infection after transplantation of organs from hepatitis C antibody positive donors .

Answer: hepatitis C antibody


Question:  Similarly , beta adrenoceptors blockade has been shown to be of value in achieving continence in a small group of patients .

Answer:
beta adrenoceptors