11918
Northern blot analysis showed that Nfil3/ E4bp4 is regulated as a "delayed-early" IL-3 -responsive gene , requiring de novo protein synthesis .
 ( protein: E4bp4, None) , ( protein: IL-3, None) , ( protein: Nfil3/ E4bp4, None) , ( DNA: "delayed-early" IL-3 -responsive gene, 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: E4bp4, None) , ( protein: IL-3, None) , ( protein: Nfil3/ E4bp4, None) , ( DNA: "delayed-early" IL-3 -responsive gene, None) 