1500
Mutagenesis studies, and the use of a reporter construct containing an enhancerless promoter, indicate that these transcriptional effects are due principally to the 22-bp sequence duplication and the NF kappa B site contained within it.
 ( protein: NF kappa B, None) , ( DNA: 22-bp sequence duplication, None) , ( DNA: NF kappa B site, 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:
 ( protein: NF kappa B, None) , ( DNA: 22-bp sequence duplication, None) , ( DNA: NF kappa B site, None) 