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]:  Eosinophil nuclear extracts contain multiple factors that can specifically recognize the IL - 4 promoter P1 NFAT site in DNA - binding assays , including NFATp .
[EX A]: IL - 4

[EX Q]:  Previously described enhancement of in vitro transcription that was only seen with nuclear extracts derived from B - cell neoplasms corresponding to the late stages of B - cell differentiation was shown to be dependent on the actions of these factor ( s ) on the DNA region within the V kappa gene promoter .
[EX A]: V kappa

[EX Q]:  These data provide insight into SCN unresponsive to standard G - CSF treatment and to the potential corrective action of combined treatment with G - CSF and corticosteroids through synergistic activation of STAT5 .
[EX A]:
G - CSF