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.

Input: Consider Input: The effect of histamine-H1 receptor antagonism with terfenadine on concentration-related AMP-induced bronchoconstriction in asthma.

Output: histamine-H1 receptor


Input: Consider Input: Cholinergic modulation by opioid receptor ligands: potential application to Alzheimer's disease.

Output: opioid receptor


Input: Consider Input: The ATP required for potentiation of skeletal muscle contraction is released via pannexin hemichannels.


Output: pannexin


