12770
These regulatory elements situated downstream of transcription interact with constitutive and inducible transcription factors , mediate transmission of cellular activation signals , and are important for efficient HIV-1 transcription and replication .
 ( DNA: regulatory elements, None) , ( protein: transcription factors, 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: regulatory elements, None) , ( protein: transcription factors, None) 