3644
To examine whether an active negative regulatory process occurs, we created a reporter construct containing as an enhancer four copies of the NF-AT site and one copy of the octamer site ( 4X NF-AT-Oct ).
 ( DNA: octamer site, None) , ( DNA: 4X NF-AT-Oct, None) , ( DNA: reporter construct, None) , ( DNA: NF-AT site, None) , ( DNA: enhancer, 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: octamer site, None) , ( DNA: 4X NF-AT-Oct, None) , ( DNA: reporter construct, None) , ( DNA: NF-AT site, None) , ( DNA: enhancer, None) 