797
The activation of Jak 2 was studied by autophosphorylation of the immunoprecipitated kinase .
 ( protein: Jak 2, None) , ( protein: immunoprecipitated kinase, 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 2, None) , ( protein: immunoprecipitated kinase, None) 