12296
We have used a human T-lymphotropic virus type 1 ( HTLV-1 ) model of cAMP response element ( CRE ) transcription to investigate the influence of lymphocyte activation on transcription from homologous regions in the viral promoter .
 ( DNA: CRE, None) , ( DNA: cAMP response element, None) , ( DNA: viral promoter, 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: CRE, None) , ( DNA: cAMP response element, None) , ( DNA: viral promoter, None) 