12210
From sequence analysis, two of these appear to be novel transcription factor binding sites , whereas the third was identified as a cyclic AMP response element ( CRE ).
 ( DNA: binding sites, None) , ( protein: transcription factor, None) , ( DNA: cyclic AMP response element, None) , ( DNA: CRE, 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: binding sites, None) , ( protein: transcription factor, None) , ( DNA: cyclic AMP response element, None) , ( DNA: CRE, None) 