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.

Input: Consider Input: Anabolic effects of clenbuterol on skeletal muscle are mediated by beta 2-adrenoceptor activation.

Output: beta 2-adrenoceptor


Input: Consider Input: Loss of beta-adrenoceptor response in myocytes overexpressing the Na+/Ca(2+)-exchanger.

Output: beta-adrenoceptor


Input: Consider Input: Investigating the enteroenteric recirculation of apixaban, a factor Xa inhibitor: administration of activated charcoal to bile duct-cannulated rats and dogs receiving an intravenous dose and use of drug transporter knockout rats.


Output: factor Xa