602
Transfection experiments with c-myc promoter constructs in both DHL-9 and Raji cells revealed that the PuF site functioned as a positive regulatory element in B cells with a drop in activity with mutation of this site.
 ( DNA: c-myc promoter constructs, None) , ( cell type: B cells, None) , ( DNA: positive regulatory element, None) , ( DNA: PuF site, None) , ( cell line: Raji cells, None) , ( DNA: c-myc promoter, None) , ( cell line: DHL-9, 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: c-myc promoter constructs, None) , ( cell type: B cells, None) , ( DNA: positive regulatory element, None) , ( DNA: PuF site, None) , ( cell line: Raji cells, None) , ( DNA: c-myc promoter, None) , ( cell line: DHL-9, None) 