14722
A similar comparison with protease-treated extracts prepared from Jurkat cells demonstrated the presence of the band 1pk activity despite an absence of the native RFX activity .
 ( cell line: Jurkat cells, None) , ( protein: RFX, None) , ( cell line: Jurkat, 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 line: Jurkat cells, None) , ( protein: RFX, None) , ( cell line: Jurkat, None) 