2973
The activity of DNA binding NF-kappa B dimers is tightly controlled by accessory proteins called I kappa B subunits of which there are also five different species currently known in vertebrates .
 ( protein: NF-kappa B, None) , ( protein: accessory proteins, None) , ( protein: I kappa B subunits, None) , ( protein: DNA binding NF-kappa B dimers, 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: NF-kappa B, None) , ( protein: accessory proteins, None) , ( protein: I kappa B subunits, None) , ( protein: DNA binding NF-kappa B dimers, None) 