11834
We have previously shown that IL-6 induces activation of JAK1 and JAK2 in human B cell lines .
 ( protein: JAK2, None) , ( cell line: human B cell lines, None) , ( protein: JAK1, None) , ( protein: IL-6, 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: JAK2, None) , ( cell line: human B cell lines, None) , ( protein: JAK1, None) , ( protein: IL-6, None) 