4184
The results suggest a new option for HIV gene therapy ; bcl-2 muteins that have noncleavable alterations surrounding the HIV protease cleavage site .
 ( protein: noncleavable alterations, None) , ( protein: bcl-2 muteins, None) , ( protein: HIV protease, None) , ( protein: HIV protease cleavage site, 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: noncleavable alterations, None) , ( protein: bcl-2 muteins, None) , ( protein: HIV protease, None) , ( protein: HIV protease cleavage site, None) 