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Using Scatchard analysis, we have determined the dissociation constants of homodimeric p49 and heterodimeric p49/p65 for binding to the HIV kappa B site .
 ( protein: heterodimeric p49/p65, None) , ( DNA: kappa B site, None) , ( DNA: HIV kappa B site, None) , ( protein: homodimeric p49, 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: heterodimeric p49/p65, None) , ( DNA: kappa B site, None) , ( DNA: HIV kappa B site, None) , ( protein: homodimeric p49, None) 