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There are at least two genes, alpha A and alpha B , encoding the alpha subunit .
 ( DNA: alpha A, None) , ( DNA: alpha B, None) , ( protein: alpha subunit, 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: alpha A, None) , ( DNA: alpha B, None) , ( protein: alpha subunit, None) 