12808
Coincidentally, a deletion of this region enhanced the IL-2 -induced expression of beta-casein .
 ( protein: IL-2, None) , ( protein: beta-casein, 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: IL-2, None) , ( protein: beta-casein, None) 