9499
YY1 , a widely distributed human transcription factor , is known to inhibit HIV-1 long terminal repeat ( LTR ) transcription and virus production .
 ( DNA: LTR, None) , ( DNA: HIV-1 long terminal repeat, None) , ( protein: YY1, None) , ( protein: human transcription factor, 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:
 ( DNA: LTR, None) , ( DNA: HIV-1 long terminal repeat, None) , ( protein: YY1, None) , ( protein: human transcription factor, None) 