11777
The tax gene product of the type I human T-cell leukemia virus ( HTLV-I ) transactivates interleukin-2 ( IL-2 ) gene through activation of an enhancer termed CD28 responsive element ( CD28RE ).
 ( DNA: CD28RE, None) , ( DNA: CD28 responsive element, None) , ( DNA: interleukin-2 ( IL-2 ) gene, None) , ( protein: IL-2, 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: CD28RE, None) , ( DNA: CD28 responsive element, None) , ( DNA: interleukin-2 ( IL-2 ) gene, None) , ( protein: IL-2, None) 