8646
Cutting edge: dominant effect of Ile50Val variant of the human IL-4 receptor alpha-chain in IgE synthesis .
 ( protein: Ile50Val variant, None) , ( protein: IgE, None) , ( protein: human IL-4 receptor alpha-chain, 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: Ile50Val variant, None) , ( protein: IgE, None) , ( protein: human IL-4 receptor alpha-chain, None) 