5326
In an attempt to identify changes in gene expression that accompany the T-cell stimulation defects associated with the loss of Rel , we have examined the expression of cell surface activation markers and cytokine production in mitogen-stimulated Rel -/- T cells .
 ( protein: cell surface activation markers, None) , ( cell type: Rel -/- T cells, None) , ( protein: Rel, None) , ( protein: Rel, 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: cell surface activation markers, None) , ( cell type: Rel -/- T cells, None) , ( protein: Rel, None) , ( protein: Rel, None) 