1095
Viral transcription, as measured using LTR -CAT assays , was only slightly enhanced in the HIV-protease expressing cells , while secretion of IL-2 and expression of the IL-2 receptor were not affected.
 ( protein: IL-2, None) , ( protein: IL-2, None) , ( DNA: LTR, None) , ( protein: -CAT, None) , ( cell type: HIV-protease expressing cells, 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:
 ( protein: IL-2, None) , ( protein: IL-2, None) , ( DNA: LTR, None) , ( protein: -CAT, None) , ( cell type: HIV-protease expressing cells, None) 