8596
The lack of B29 transcripts , coding for the beta subunit of the B-cell receptor complex, in pro-B cells from EBF -deficient mice suggested that B29 might be a genetic target for EBF .
 ( protein: EBF, None) , ( cell type: pro-B cells, None) , ( protein: EBF, None) , ( protein: beta subunit, None) , ( RNA: B29 transcripts, 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: EBF, None) , ( cell type: pro-B cells, None) , ( protein: EBF, None) , ( protein: beta subunit, None) , ( RNA: B29 transcripts, None) 