4709
MEK1 and the extracellular signal-regulated kinases are required for the stimulation of IL-2 gene transcription in T cells .
 T cells, IL-2 gene, extracellular signal-regulated kinases, MEK1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 T cells, IL-2 gene, extracellular signal-regulated kinases, MEK1