11396
Differentiation of U-937 promonocytic cells by etoposide and ICRF-193 , two antitumour DNA topoisomerase II inhibitors with different mechanisms of action.
 ( protein: DNA topoisomerase II, None) , ( cell line: U-937 promonocytic 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: DNA topoisomerase II, None) , ( cell line: U-937 promonocytic cells, None) 