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: Fragment-based design, synthesis, and biological evaluation of N-substituted-5-(4-isopropylthiophenol)-2-hydroxynicotinamide derivatives as novel Mcl-1 inhibitors.

Answer: Mcl-1


Question: Use of the norepinephrine transporter as a reporter gene for non-invasive imaging of genetically modified cells.

Answer: norepinephrine transporter


Question: Practical asymmetric synthesis of aprepitant, a potent human NK-1 receptor antagonist, via a stereoselective Lewis acid-catalyzed trans acetalization reaction.

Answer:
NK-1 receptor