381
We now demonstrate that B7 , but not LFA-3 , strongly costimulated IL-2 transcription and mRNA expression in CD4+ T cells .
 ( protein: B7, None) , ( protein: LFA-3, None) , ( protein: IL-2, None) , ( cell line: CD4+ T cells, 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: B7, None) , ( protein: LFA-3, None) , ( protein: IL-2, None) , ( cell line: CD4+ T cells, None) 