8544
Using sequential deletion mutants of the human fas promoter in transient transfection assays, we identified a 47-bp sequence ( positions -306 to -260 relative to the ATG ) required for activation-driven fas upregulation .
 ( DNA: sequential deletion mutants, None) , ( DNA: 47-bp sequence, None) , ( DNA: human fas promoter, None) , ( DNA: positions -306 to -260, 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: sequential deletion mutants, None) , ( DNA: 47-bp sequence, None) , ( DNA: human fas promoter, None) , ( DNA: positions -306 to -260, None) 