9068
Cell separation experiments suggest that IL-10 can effect purified CD4(+) T cells directly, providing functional evidence for the presence of IL-10 receptors on CD4(+) T cells .
 ( cell type: CD4(+) T cells, None) , ( cell type: CD4(+) T cells, None) , ( protein: IL-10, None) , ( protein: IL-10, 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:
 ( cell type: CD4(+) T cells, None) , ( cell type: CD4(+) T cells, None) , ( protein: IL-10, None) , ( protein: IL-10, None) 