4132
The core GGAAs of the muA and muB sites are separated by 30 nucleotides , suggesting that ETS proteins bind to these sites from these same side of the DNA helix .
 ( DNA: DNA helix, None) , ( protein: ETS proteins, 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: DNA helix, None) , ( protein: ETS proteins, None) 