13801
Flow cytometry revealed that primary leukemia cells from a patient with CD8+ T-PLL expressed IL-2R alpha and beta chains , and the cells showed a proliferative response and an increase in IL-2Ralpha expression on culture with exogeneous IL-2 .
 ( protein: IL-2Ralpha, None) , ( protein: IL-2, None) , ( cell type: primary leukemia cells, 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: IL-2Ralpha, None) , ( protein: IL-2, None) , ( cell type: primary leukemia cells, None) 