1043
In contrast, the addition of GM-CSF to the M-TAT/EPO cell culture decreased the amount of hemoglobin, even in the presence of EPO , indicating that the EPO signal for erythroid differentiation is suppressed by GM-CSF .
 ( protein: GM-CSF, None) , ( protein: GM-CSF, None) , ( protein: EPO, None) , ( cell line: M-TAT/EPO cell culture, None) , ( protein: EPO, 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: GM-CSF, None) , ( protein: GM-CSF, None) , ( protein: EPO, None) , ( cell line: M-TAT/EPO cell culture, None) , ( protein: EPO, None) 