9927
To further elucidate the role of RelB in DC differentiation , mRNA , intracellular protein expression , and DNA binding activity of RelB were examined in immature and differentiated human DC , as well as other PB mononuclear cell populations .
 ( protein: RelB, None) , ( cell type: PB mononuclear cell populations, None) , ( RNA: mRNA, None) , ( cell type: DC, None) , ( protein: RelB, None) , ( cell type: DC, None) , ( cell type: human DC, 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: RelB, None) , ( cell type: PB mononuclear cell populations, None) , ( RNA: mRNA, None) , ( cell type: DC, None) , ( protein: RelB, None) , ( cell type: DC, None) , ( cell type: human DC, None) 