380
We have earlier shown that stimulation of human CD4+ T cells with SEA presented on Chinese hamster ovary (CHO)-DR transfectants coexpressing either B7 or LFA-3 resulted in distinct cytokine profiles .
 ( protein: B7, None) , ( protein: cytokine, None) , ( cell line: human CD4+ T cells, None) , ( cell line: Chinese hamster ovary (CHO)-DR transfectants, None) , ( protein: LFA-3, 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: cytokine, None) , ( cell line: human CD4+ T cells, None) , ( cell line: Chinese hamster ovary (CHO)-DR transfectants, None) , ( protein: LFA-3, None) 