6049
By functionally expressing receptor mutants in the murine pro-B cell line Ba/F3 , we could show that phosphorylated tyrosine residues within the IL-4R alpha chain are dispensable for IL-4 -induced STAT5 activity .
 ( protein: STAT5, None) , ( cell line: Ba/F3, None) , ( protein: IL-4R alpha chain, None) , ( protein: receptor mutants, None) , ( cell line: murine pro-B cell line, None) , ( protein: IL-4, 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: STAT5, None) , ( cell line: Ba/F3, None) , ( protein: IL-4R alpha chain, None) , ( protein: receptor mutants, None) , ( cell line: murine pro-B cell line, None) , ( protein: IL-4, None) 