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.

[EX Q]:  Single dose intranasal administration of retinal autoantigen generates a rapid accumulation and cell activation in draining lymph node and spleen : implications for tolerance therapy .
[EX A]: retinal autoantigen

[EX Q]:  IL - 4 plays a critical role in the differentiation of T CR - stimulated naive CD4 T cells to the Th2 phenotype .
[EX A]: IL - 4

[EX Q]:  These studies have begun to elucidate the basis for cell - specificity and high - level expression of cytokine genes .
[EX A]:
cytokine genes