5331
In contrast to mitogen-activated Rel -/- T cells , lipopolysaccharide-stimulated Rel -/- macrophages produce higher than normal levels of GM-CSF .
 ( protein: Rel, None) , ( protein: Rel, None) , ( protein: GM-CSF, None) , ( cell line: mitogen-activated Rel -/- T cells, None) , ( cell line: Rel -/- macrophages, 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: Rel, None) , ( protein: Rel, None) , ( protein: GM-CSF, None) , ( cell line: mitogen-activated Rel -/- T cells, None) , ( cell line: Rel -/- macrophages, None) 