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.

 Unlike antioxidants , hypoxia did not inhibit nuclear factor KB mobilization .
nuclear factor

 Using enhancer - reporter constructs , IL - 4 specifically down - regulated the NFIL - 2B element .
IL - 4

 Transfection studies have established that this octamer is involved in the lymphoid - specific transcription of immunoglobulin genes .

immunoglobulin genes