14697
All sequence motifs within the functional core of HS-40 , as mapped by transient expression analysis, appeared to bind a nuclear factor (s) in living K562 cells but not in nonerythroid cells .
 ( protein: nuclear factor, None) , ( cell type: nonerythroid cells, None) , ( cell line: K562 cells, None) , ( DNA: HS-40, 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: nuclear factor, None) , ( cell type: nonerythroid cells, None) , ( cell line: K562 cells, None) , ( DNA: HS-40, None) 