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.

[EX Q]: The mechanism of reducing NO production resulting from inhaled NO may involve , in part , the activities of reactive oxygen species and / or nuclear factor - kappaB .
[EX A]: nuclear factor

[EX Q]: NF - P2 appears to be induced by reagents known to up - regulate the perforin message level and is present exclusively in killer cells .
[EX A]: NF - P2

[EX Q]: Furthermore , the SH2 domain of p56 ( lck ) appeared to be required for pervanadate - induced NF - kappa B activation but not for Tyr42 phosphorylation .
[EX A]:
SH2 domain