519
The transcription activation function is provided by the N-terminal acidic domain ( amino acids 26-137 ), which is experimentally exchangeable with a heterologous viral transcription-activating domain .
 ( protein: heterologous viral transcription-activating domain, None) , ( protein: N-terminal acidic domain, None) , ( protein: amino acids 26-137, 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: heterologous viral transcription-activating domain, None) , ( protein: N-terminal acidic domain, None) , ( protein: amino acids 26-137, None) 