761
Infection and replication of Tat- human immunodeficiency viruses : genetic analyses of LTR and tat mutations in primary and long-term human lymphoid cells .
 ( DNA: LTR, None) , ( protein: tat mutations, 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) , ( protein: tat mutations, None) 