TASK DEFINITION: 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.
PROBLEM:  Thus , IL - 6 promotes CD4 + Th2 differentiation and inhibits Th1 differentiation by two independent molecular mechanisms .

SOLUTION: IL - 6

PROBLEM:  The differential timing of CD4 and HLA - A2 downmodulation may have implications for HIV pathogenesis and immune evasion .

SOLUTION: HLA - A2

PROBLEM:  We showed in the present study that the induction of IL - 12 p40 gene but not IL - 12 p35 gene in macrophages of P . berghei - infected mice was profoundly inhibited .

SOLUTION:
IL - 12