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 Input:
Histamine enhances the depolarizing afterpotential of immunohistochemically identified vasopressin neurons in the rat supraoptic nucleus via H1-receptor activation.

Ex Output:
H1-receptor


Ex Input:
The effect of a novel transition state inhibitor of methylthioadenosine phosphorylase on pemetrexed activity.

Ex Output:
methylthioadenosine phosphorylase


Ex Input:
A molecular mechanism of action of theophylline: Induction of histone deacetylase activity to decrease inflammatory gene expression.

Ex Output:

histone deacetylase