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.

Q: Structure and energetics of gas phase halogen-bonding in mono-, bi-, and tri-dentate anion receptors as studied by BIRD.

A: mono-, bi-, and tri-dentate anion receptors
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Q: Multiple affinity states of opiate receptor in neuroblastoma x glioma NG108-15 hybrid cells. Opiate agonist association rate is a function of receptor occupancy.

A: opiate receptor
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Q: The atypical antidepressant mianserin exhibits agonist activity at kappa-opioid receptors.

A:
kappa-opioid
****