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In the present study, we have utilized a mutant Jak1 -deficient HeLa cell line , E1C3 , and its parental Jak1 -expressing counterpart , 1D4 , to analyze the role of Jak1 in mediating IL-4-induced tyrosine phosphorylation events.
 ( cell line: E1C3, None) , ( cell line: parental Jak1 -expressing counterpart, None) , ( protein: Jak1, None) , ( protein: Jak1, None) , ( cell line: 1D4, None) , ( protein: Jak1, None) , ( cell line: mutant Jak1 -deficient HeLa cell line, 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:
 ( cell line: E1C3, None) , ( cell line: parental Jak1 -expressing counterpart, None) , ( protein: Jak1, None) , ( protein: Jak1, None) , ( cell line: 1D4, None) , ( protein: Jak1, None) , ( cell line: mutant Jak1 -deficient HeLa cell line, None) 