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In HTLV-I -infected cord blood lymphocytes , the transition from IL-2 -dependent to IL-2 -independent growth correlated with the acquisition of a constitutively activated Jak -STAT pathway , which suggests that this pathway participates in HTLV-I -mediated T cell transformation .
 ( protein: Jak, None) , ( protein: -STAT, None) , ( protein: IL-2, None) , ( protein: IL-2, None) , ( cell line: HTLV-I -infected cord blood lymphocytes, 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: Jak, None) , ( protein: -STAT, None) , ( protein: IL-2, None) , ( protein: IL-2, None) , ( cell line: HTLV-I -infected cord blood lymphocytes, None) 