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.

 Lymphocyte commitment and differentiation are accompanied by programmed gene expression or repression events which are driven by lineage and stage specific transcription factors .
transcription factors

 Constitutive PI3 - K activity is essential for proliferation , but not survival , of Theileria parva - transformed B cells .
PI3 - K

 These data argue against a central role of nuclear factor - kappaB activation and neutrophil infiltration as perpetuating factors of liver injury in acetaminophen toxicity .

nuclear factor