11078
Based on these observations, it is possible that the interaction of Sp and ATF/CREB family members with the pp repeat during basal and Tax -mediated transcription may play a critical role in viral gene expression during the initial stages of virus infection or during activation of a latent infection .
 ( protein: Sp, None) , ( DNA: pp repeat, None) , ( protein: Tax, None) , ( protein: ATF/CREB family members, 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: Sp, None) , ( DNA: pp repeat, None) , ( protein: Tax, None) , ( protein: ATF/CREB family members, None) 