10131
The C/EBP motif is bound by Ig/EBP-1 in pre-B cell and T cell extracts , but is replaced by nuclear factor-IL-6beta or a nuclear factor-IL-6beta -Ig/EBP-1 heterodimer in plasmacytoma cell extracts.
 ( protein: nuclear factor-IL-6beta, None) , ( protein: -Ig/EBP-1, None) , ( protein: Ig/EBP-1, None) , ( protein: nuclear factor-IL-6beta, None) , ( protein: nuclear factor-IL-6beta -Ig/EBP-1 heterodimer, None) , ( DNA: C/EBP motif, 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: nuclear factor-IL-6beta, None) , ( protein: -Ig/EBP-1, None) , ( protein: Ig/EBP-1, None) , ( protein: nuclear factor-IL-6beta, None) , ( protein: nuclear factor-IL-6beta -Ig/EBP-1 heterodimer, None) , ( DNA: C/EBP motif, None) 