5143
Despite the dual specificity of HTLV-1 Tax for IkappaBalpha and IkappaBbeta at the protein level, Tax selectively stimulates NF-kappaB -directed transcription of the IkappaBalpha gene .
 ( protein: IkappaBalpha, None) , ( protein: Tax, None) , ( protein: IkappaBalpha, None) , ( protein: IkappaBbeta, None) , ( DNA: IkappaBalpha gene, None) , ( protein: NF-kappaB, None) , ( protein: Tax, 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: IkappaBalpha, None) , ( protein: Tax, None) , ( protein: IkappaBalpha, None) , ( protein: IkappaBbeta, None) , ( DNA: IkappaBalpha gene, None) , ( protein: NF-kappaB, None) , ( protein: Tax, None) 