7690
As expected, these transgenic mice developed splenomegaly due to the massive amplification of Ter 119 positive erythroid nucleated cells expressing T antigen .
 ( cell line: Ter 119 positive erythroid nucleated cells, None) , ( protein: T antigen, 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: Ter 119 positive erythroid nucleated cells, None) , ( protein: T antigen, None) 