1644
Elf-1 physically associated with HMG-I and with NF-kappa B p50 and c-Rel in vitro, suggesting that protein-protein interactions might functionally coordinate the actions of the upstream and downstream positive regulatory elements .
 ( protein: NF-kappa B, None) , ( protein: HMG-I, None) , ( protein: Elf-1, None) , ( protein: c-Rel, None) , ( protein: p50, 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: HMG-I, None) , ( protein: Elf-1, None) , ( protein: c-Rel, None) , ( protein: p50, None) 