5000
Thus, A-myb expression , unlike that of c-myb and B-myb , is restricted to a subset of B-cell neoplasias (in particular BL and slg+B- ALL ) representative of a specific stage of B-cell differentiation .
 ( DNA: A-myb, None) , ( DNA: B-myb, None) , ( DNA: c-myb, 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:
 ( DNA: A-myb, None) , ( DNA: B-myb, None) , ( DNA: c-myb, None) 