1743
Activated Jurkat cells died by apoptosis , and only cells with mutated nef genes expressing truncated Nefs survived, which rendered Nef nonfunctional.
 ( DNA: nef genes, None) , ( cell line: Jurkat cells, None) , ( protein: Nef, None) , ( protein: Nefs, 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: nef genes, None) , ( cell line: Jurkat cells, None) , ( protein: Nef, None) , ( protein: Nefs, None) 