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:
Arsenic suppresses cell survival via Pirh2-mediated proteasomal degradation of Np63 protein.
answer:
Np63

question:
Clinical, biochemical and molecular diagnosis of a compound homozygote for the 254 bp deletion-8 bp insertion of the APRT gene suffering from severe renal failure.
answer:
APRT

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