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.

 Inhibition of constitutive NF - kappaB activity in U9 - IIIB and PLB - IIIB cells also induced apoptosis , suggesting that NF - kappaB protects cells from a persistent apoptotic signal .
NF - kappaB