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 addition , the proliferative advantage of p12 ( I ) - transduced PBMCs was evident mainly at low concentrations of IL - 2 .
answer:
IL - 2


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


question:
 We have identified a novel Kruppel - type zinc finger ( ZF ) gene , SKAT - 2 , which is selectively expressed by murine Th2 cells .
answer:

SKAT - 2