11849
The ferritin H-chain gene promoter regulation was analyzed in heme-treated Friend leukemia cells ( FLCs ) and during monocyte-to-macrophage differentiation .
 ( cell line: heme-treated Friend leukemia cells, None) , ( cell line: FLCs, None) , ( DNA: ferritin H-chain gene promoter, 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: heme-treated Friend leukemia cells, None) , ( cell line: FLCs, None) , ( DNA: ferritin H-chain gene promoter, None) 