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.

 Recently , NF - kappaB induction has been shown to play a role in protecting cells from programmed cell death .
NF - kappaB

 Catalytically active Syk promotes and stabilizes the formation of tightly capped BCR complexes at the plasma membrane .
BCR complexes

 Stem cell factor ( SCF ) and erythropoietin ( EPO ) work synergistically to support erythropoiesis , but the mechanism for this synergism is unknown .

Stem cell factor