14981
We have now examined expression of the mouse E2A gene at the protein level using polyclonal antisera directed against distinct portions of the E2A protein to probe blots of cellular extracts .
 ( protein: E2A protein, None) , ( DNA: mouse E2A gene, None) , ( DNA: E2A gene, 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: E2A protein, None) , ( DNA: mouse E2A gene, None) , ( DNA: E2A gene, None) 