14696
Finally, we did genomic footprinting of the HS-40 enhancer region in K562 cells , adult nucleated erythroblasts , and different nonerythroid cells .
 ( cell line: adult nucleated erythroblasts, None) , ( DNA: HS-40 enhancer region, None) , ( cell line: K562 cells, None) , ( cell type: nonerythroid 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:
 ( cell line: adult nucleated erythroblasts, None) , ( DNA: HS-40 enhancer region, None) , ( cell line: K562 cells, None) , ( cell type: nonerythroid cells, None) 