536
On the other hand, the 3'NF-E2/AP1 motif is able to exert both positive and negative regulatory effects on the zeta 2-globin promoter activity in K562 cells , and this dual function appears to be modulated through differential binding of the ubiquitous AP1 factors and the erythroid-enriched NF-E2 factor .
 ( DNA: 3#$%#NF-E2/AP1 motif, None) , ( cell line: K562 cells, None) , ( DNA: zeta 2-globin promoter, None) , ( protein: ubiquitous AP1 factors, None) , ( protein: erythroid-enriched NF-E2 factor, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: 3#$%#NF-E2/AP1 motif, None) , ( cell line: K562 cells, None) , ( DNA: zeta 2-globin promoter, None) , ( protein: ubiquitous AP1 factors, None) , ( protein: erythroid-enriched NF-E2 factor, None) 