4247
This was identified as the mRNA encoding the transcription factor egr-1 , which is expressed with fast kinetics in T and NK cells upon IL-2 , but not IL-12 , stimulation.
 ( protein: egr-1, None) , ( protein: transcription factor, None) , ( RNA: mRNA, None) , ( protein: IL-12, None) , ( protein: IL-2, 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:
 ( protein: egr-1, None) , ( protein: transcription factor, None) , ( RNA: mRNA, None) , ( protein: IL-12, None) , ( protein: IL-2, None) 