5686
Due to its location within this cluster and its biologic role in Ig class switching and Th2 cell differentiation , the IL-4 gene has emerged as one major candidate for the atopy gene .
 ( DNA: atopy gene, None) , ( cell line: Th2 cell, None) , ( DNA: IL-4 gene, 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:
 ( DNA: atopy gene, None) , ( cell line: Th2 cell, None) , ( DNA: IL-4 gene, None) , ( protein: IL-4, None) 