800
Jak 2 coprecipitated with the beta-subunit of the IL-5 receptor , suggesting a physical association of the kinase with the receptor.
 ( protein: IL-5, None) , ( protein: kinase, None) , ( protein: IL-5 receptor, None) , ( protein: Jak 2, 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-5, None) , ( protein: kinase, None) , ( protein: IL-5 receptor, None) , ( protein: Jak 2, None) 