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Forty-one HD samples (19 NLPHD , 12 nodular sclerosis , and 10 mixed cellularity) were immunostained with the monoclonal antibodies PG-B6 and PG-B6p that react with a fixative-sensitive and a formalin-resistant epitope on the aminoterminal region of the BCL-6 gene product , respectively.
 ( protein: PG-B6, None) , ( protein: BCL-6 gene product, None) , ( protein: aminoterminal region, None) , ( protein: PG-B6p, None) , ( protein: formalin-resistant epitope, None) , ( protein: monoclonal antibodies, None) , ( protein: BCL-6, 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: PG-B6, None) , ( protein: BCL-6 gene product, None) , ( protein: aminoterminal region, None) , ( protein: PG-B6p, None) , ( protein: formalin-resistant epitope, None) , ( protein: monoclonal antibodies, None) , ( protein: BCL-6, None) 