772
Direct sequencing of the viral genomes and reinfection kinetics showed no evidence of wild-type reversion even after prolonged infection with the Tat -virus .
 ( DNA: viral genomes, None) , ( protein: Tat, 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: viral genomes, None) , ( protein: Tat, None) 