6056
Immunoprecipitation of epitope-labeled BKO demonstrated for the formation of a tight complex with endogenous B subunit in Jurkat cells , consistent with an inhibitory mechanism that involves the sequestration of the B subunit .
 ( protein: endogenous B subunit, None) , ( cell line: Jurkat cells, None) , ( protein: B subunit, None) , ( protein: epitope-labeled BKO, 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: endogenous B subunit, None) , ( cell line: Jurkat cells, None) , ( protein: B subunit, None) , ( protein: epitope-labeled BKO, None) 