3363
By immunohistochemistry , p50 protein was detected in the cytoplasm and nucleus of FDC , confirming the involvement of FDC .
 ( cell type: FDC, None) , ( cell type: FDC, None) , ( protein: p50, 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: FDC, None) , ( cell type: FDC, None) , ( protein: p50, None) 