6476
Both the DNA binding and transactivation domains of PU.1 are required for repression and both domains are also needed to block terminal differentiation in MEL cells .
 ( protein: DNA binding, None) , ( cell line: MEL cells, None) , ( protein: transactivation domains, None) , ( protein: PU.1, 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: DNA binding, None) , ( cell line: MEL cells, None) , ( protein: transactivation domains, None) , ( protein: PU.1, None) 