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.

[EX Q]: Inhibition of cardiac voltage-gated sodium channels by grape polyphenols.
[EX A]: voltage-gated sodium channels

[EX Q]: In vitro metabolism of the 5-hydroxytryptamine1B receptor antagonist elzasonan.
[EX A]: 5-hydroxytryptamine1B

[EX Q]: Extracellular loop II modulates GTP sensitivity of the prostaglandin EP3 receptor.
[EX A]:
EP3