4802
HL-60 cells were found to express mafK mRNA , indicating the presence of genuine NF-E2 complex in the cells.
 ( cell line: HL-60 cells, None) , ( RNA: mafK mRNA, None) , ( protein: NF-E2 complex, 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: HL-60 cells, None) , ( RNA: mafK mRNA, None) , ( protein: NF-E2 complex, None) 