595
Subsequently, TCF-1 -specific hybridomas could be prepared from the spleens of immunized knock-out mice .
 ( cell line: TCF-1 -specific hybridomas, 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:
 ( cell line: TCF-1 -specific hybridomas, None) , ( protein: TCF-1, None) 