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:
 The quantitative analysis showed that erythroid precursor cells were newly produced from the immature myeloid cells by cultivation with IL - 3 .
answer:
IL - 3


question:
 In this study , we investigated a possible link between Ii - dependent B cell maturation and the NF - kappaB pathway .
answer:

NF - kappaB