instruction:
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.
question:
Cholinergic modulation by opioid receptor ligands: potential application to Alzheimer's disease.
answer:
opioid receptor


question:
Fragment-based design, synthesis, and biological evaluation of N-substituted-5-(4-isopropylthiophenol)-2-hydroxynicotinamide derivatives as novel Mcl-1 inhibitors.
answer:
Mcl-1


question:
Loss of beta-adrenoceptor response in myocytes overexpressing the Na+/Ca(2+)-exchanger.
answer:

beta-adrenoceptor