12101
The caprine arthritis-encephalitis virus ( CAEV ) long terminal repeat ( LTR ) is activated by gamma interferon ( IFN-gamma ) in promonocytic cells .
 ( DNA: caprine arthritis-encephalitis virus ( CAEV ) long terminal repeat, None) , ( protein: gamma interferon, None) , ( protein: IFN-gamma, None) , ( cell type: promonocytic cells, None) , ( DNA: LTR, 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: caprine arthritis-encephalitis virus ( CAEV ) long terminal repeat, None) , ( protein: gamma interferon, None) , ( protein: IFN-gamma, None) , ( cell type: promonocytic cells, None) , ( DNA: LTR, None) 