5235
Therefore, the surprisingly high replicative capacity of NF-kappaB and Sp1 binding site mutants of SIVmac is due to unique features or the enhancer/promoter region .
 ( DNA: enhancer/promoter region, 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: enhancer/promoter region, None) 