Q: 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.
7 - Nitroindazole ( 7NI ) , a relatively selective neuronal nitric oxide synthase ( nNOS ) inhibitor . was intraperitoneally administered to the guinea pigs 30 minutes before the onset of local anoxia .
A:
nitric oxide synthase