13470
We studied their activity after transfection into K562 cells , an erythroleukemia cell line with an embryonic-fetal phenotype .
 ( cell line: K562 cells, None) , ( cell line: erythroleukemia cell line, 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: K562 cells, None) , ( cell line: erythroleukemia cell line, None) 