4709
MEK1 and the extracellular signal-regulated kinases are required for the stimulation of IL-2 gene transcription in T cells .
 ( cell type: T cells, None) , ( DNA: IL-2 gene, None) , ( protein: extracellular signal-regulated kinases, None) , ( protein: MEK1, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: T cells, None) , ( DNA: IL-2 gene, None) , ( protein: extracellular signal-regulated kinases, None) , ( protein: MEK1, None) 