594
Wild-type littermates remain unresponsive to TCF-1 while they mount a high-titer antibody response to the fusion protein , Maltose Binding Protein ( MBP ).
 ( protein: Maltose Binding Protein, None) , ( protein: MBP, None) , ( protein: fusion protein, None) , ( protein: TCF-1, 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: Maltose Binding Protein, None) , ( protein: MBP, None) , ( protein: fusion protein, None) , ( protein: TCF-1, None) 