1307
GM-kappa B defines a binding site for NF-kappa B , and GC-box defines a binding site for three ( A1 , A2 , B ) constitutive proteins .
 ( protein: A1, None) , ( protein: NF-kappa B, None) , ( protein: GM-kappa B, None) , ( protein: A2, None) , ( protein: constitutive proteins, None) , ( DNA: GC-box, None) , ( protein: B, 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: A1, None) , ( protein: NF-kappa B, None) , ( protein: GM-kappa B, None) , ( protein: A2, None) , ( protein: constitutive proteins, None) , ( DNA: GC-box, None) , ( protein: B, None) 