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.

 Nevertheless , inhibitors of these pathways clearly reduced the TNF - alpha - induced cell growth , indicating that TNF - alpha - proliferative cells produced a growth factor that induced proliferation upon stimulation of the above pathways .
TNF - alpha

 The apparent paradox of heightened adrenal corticosteroid levels associated with reduction in the competence of the body ' s defensive apparatus to cope with exposure to new microbial antigens is considered .
microbial antigens

 It is a pterin 4alpha - carbinolamine dehydratase that is involved in the regeneration of the cofactor tetrahydrobiopterin during the phenylalanine hydroxylase - catalyzed hydroxylation of phenylalanine .

cofactor tetrahydrobiopterin