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.

Like the DMA , but unlike all other mammalian class II A genes , the zebrafish gene codes for two cysteine residues which might potentially be involved in the formation of a disulfide bond in the alpha 1 domain .
alpha 1

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 .
nitric oxide synthase

To examine the biochemical mechanism of Tax1 transactivation , we have developed an in vitro transactivation assay in which wild - type Tax1 is able to specifically transactivate a polymerase II promoter through upstream Tax1 - responsive elements .
polymerase II