13671
An in vitro surrogate of IL-2 immunotherapy is the incubation of fresh peripheral blood mononuclear cells ( PBMC ) from healthy individuals in IL-2 for several days, resulting in the production of lymphokine -activated killer (LAK) activity in these cultures.
 ( protein: IL-2, None) , ( cell type: PBMC, None) , ( protein: IL-2, None) , ( cell type: fresh peripheral blood mononuclear cells, None) , ( protein: lymphokine, 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-2, None) , ( cell type: PBMC, None) , ( protein: IL-2, None) , ( cell type: fresh peripheral blood mononuclear cells, None) , ( protein: lymphokine, None) 