837
We also examined whether CBF could distinguish a 1-bp difference between the enhancer core of SL3 and the core of the nonleukemogenic virus , Akv .
 ( DNA: enhancer core of SL3, None) , ( protein: CBF, 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 core of SL3, None) , ( protein: CBF, None) 