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: Dominant expression of mRNA for prostaglandin D synthase in leptomeninges, choroid plexus, and oligodendrocytes of the adult rat brain.

Answer: prostaglandin D synthase


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


Question: Losartan: a selective angiotensin II type 1 (AT1) receptor antagonist for the treatment of heart failure.

Answer:
angiotensin II type 1 (AT1) receptor