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.

Effects of the histamine H1 antagonist chlorcyclizine on rat fetal palate development.
histamine H1

Benzenesulfonamides: a unique class of chemokine receptor type 4 inhibitors.
chemokine receptor type 4

Effect of JTH-601, a novel alpha(1)-adrenoceptor antagonist, on prostate function in dogs.

alpha(1)-adrenoceptor