7210
Tyrosine phosphorylation of SOCS-3 was observed upon coexpression with Jak1 and Jak2 but only weakly with Jak3 .
 ( protein: SOCS-3, None) , ( protein: Jak2, None) , ( protein: Jak1, None) , ( protein: Jak3, 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: SOCS-3, None) , ( protein: Jak2, None) , ( protein: Jak1, None) , ( protein: Jak3, None) 