6688
Human T-cell leukemia virus type 1 ( HTLV-1 ) Tax transforms normal T-cells in the presence of interleukin (IL)-2 in vitro.
 ( protein: interleukin (IL)-2, None) , ( protein: Human T-cell leukemia virus type 1 ( HTLV-1 ) Tax, None) , ( cell type: T-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: interleukin (IL)-2, None) , ( protein: Human T-cell leukemia virus type 1 ( HTLV-1 ) Tax, None) , ( cell type: T-cells, None) 