11960
In the present report, we show that A6H costimulated cell proliferation and cytokine production in purified CD4+ T cells .
 ( protein: cytokine, None) , ( protein: A6H, None) , ( cell type: 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: cytokine, None) , ( protein: A6H, None) , ( cell type: CD4+ T cells, None) 