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:
 Furthermore , the SH2 domain of p56 ( lck ) appeared to be required for pervanadate - induced NF - kappa B activation but not for Tyr42 phosphorylation .
answer:
SH2 domain


question:
 This suggests the association of E2 - receptor expression with control of growth rather than cell maturation .
answer:
E2 - receptor


question:
 Dendritic cells ( DCs ) are professional antigen - presenting cells which both initiate adaptive immune responses and control tolerance to self - antigens .
answer:

self - antigens