instruction:
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.
question:
 The transcriptional events that control T cell tolerance to peripheral self Ags are still unknown .
answer:
peripheral self Ags


question:
 Single dose intranasal administration of retinal autoantigen generates a rapid accumulation and cell activation in draining lymph node and spleen : implications for tolerance therapy .
answer:
retinal autoantigen


question:
 To evaluate the role of NF - kappa B in human peripheral blood T - lymphocytes , we previously analyzed the activation of NF - kappa B - related complexes in response to CD2 + CD28 costimulation .
answer:

CD2 + CD28