13525
Each site is functionally important and contributes independently to transcription of the NF-IL6 gene in U937 cells .
 ( cell line: U937 cells, None) , ( DNA: NF-IL6 gene, None) , ( protein: NF-IL6, 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: U937 cells, None) , ( DNA: NF-IL6 gene, None) , ( protein: NF-IL6, None) 