7731
The viral protein Tax induces the activation and nuclear translocalization of transcription factor NF-kappaB , which is proposed to play a crucial role in the transformation of T cells by HTLV-I .
 ( protein: transcription factor, None) , ( protein: NF-kappaB, None) , ( protein: viral protein, None) , ( cell type: T cells, 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: transcription factor, None) , ( protein: NF-kappaB, None) , ( protein: viral protein, None) , ( cell type: T cells, None) , ( protein: Tax, None) 