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.

 TNF - alpha - related apoptosis - inducing ligand ( TRAIL ) is characterized by its preferential induction of apoptosis of tumor cells but not normal cells .
TNF - alpha

 A region of basic amino acids spanning residues 639 - 656 in the human 5 - lipoxygenase sequence resembles a consensus bipartite nuclear localizing sequence .
5 - lipoxygenase

 We analyzed the mechanism that causes suppression of IL - 12 p40 gene induction during Plasmodium berghei infection .

IL - 12