3230
These results show that, physiologically, high levels of nuclear of p50 , p52 and RelB are restricted to accessory cells of the immune system , which include FDC in GC , and DC and macrophages in the T cell zone , that specialized scavenger macrophages from GC do not have detectable levels of p52 and RelB , whereas macrophages from the T cell area , known to present the antigen to T cells , do have both nuclear p52 and RelB , and that in the T cell zone , p52 and RelB are located in nuclei of both CD1a+ , CD68+ or both, cells APC , whereas p50 is restricted to CD1a- and CD68- APC .
 ( cell type: CD1a-, None) , ( protein: RelB, None) , ( protein: p52, None) , ( cell type: GC, None) , ( cell line: CD1a+, None) , ( cell type: APC, None) , ( cell type: macrophages, None) , ( cell type: DC, None) , ( protein: p52, None) , ( protein: p52, None) , ( protein: p50, None) , ( protein: p52, None) , ( cell line: CD68+, None) , ( cell type: FDC, None) , ( cell type: CD68- APC, None) , ( protein: RelB, None) , ( protein: RelB, None) , ( cell type: T cells, None) , ( protein: p50, None) , ( protein: RelB, None) , ( cell type: accessory cells, None) , ( cell type: scavenger 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:
 ( cell type: CD1a-, None) , ( protein: RelB, None) , ( protein: p52, None) , ( cell type: GC, None) , ( cell line: CD1a+, None) , ( cell type: APC, None) , ( cell type: macrophages, None) , ( cell type: DC, None) , ( protein: p52, None) , ( protein: p52, None) , ( protein: p50, None) , ( protein: p52, None) , ( cell line: CD68+, None) , ( cell type: FDC, None) , ( cell type: CD68- APC, None) , ( protein: RelB, None) , ( protein: RelB, None) , ( cell type: T cells, None) , ( protein: p50, None) , ( protein: RelB, None) , ( cell type: accessory cells, None) , ( cell type: scavenger macrophages, None) 