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:
 In B - lymphoblastoid cell lines derived from two independent class II - deficient bare lymphocyte syndrome patients , we observed a drastic decrease in transcription rates of the class II genes .
answer:
class II genes


question:
 Suppression of lung inflammation in rats by prevention of NF - kappaB activation in the liver .
answer:
NF - kappaB


question:
 The cytoplasmic domain of 2B4 associates with src homology 2 domain - containing protein or signaling lymphocyte activation molecule - associated protein , whose mutation is the underlying genetic defect in the X - linked lymphoproliferative syndrome .
answer:

cytoplasmic domain