8710
This report provides the first demonstration that upon fusion with HeLa cells , the nuclear contents of B cell-expressed transcription factors are depleted within a few hours with kinetics that are as fast or faster than that of Ig gene extinction .
 ( protein: B cell-expressed transcription factors, None) , ( DNA: Ig gene, None) , ( protein: transcription factors, None) , ( cell line: HeLa cells, 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: B cell-expressed transcription factors, None) , ( DNA: Ig gene, None) , ( protein: transcription factors, None) , ( cell line: HeLa cells, None) 