6780
Furthermore, SLP-76 and Vav have a synergistic effect on interleukin (IL)-2 promoter activity in T cells .
 ( DNA: interleukin (IL)-2 promoter, None) , ( protein: SLP-76, None) , ( cell line: T cells, None) , ( protein: Vav, 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:
 ( DNA: interleukin (IL)-2 promoter, None) , ( protein: SLP-76, None) , ( cell line: T cells, None) , ( protein: Vav, None) 