14758
Although TR55 expression was unaltered during TNF-alpha -induced HIV activation , this receptor was still involved in the viral activation process .
 ( protein: TNF-alpha, None) , ( protein: TR55, 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: TNF-alpha, None) , ( protein: TR55, None) 