Model depicting a suggested mechanism by which Tax could increase the cooperative effect of CBP on the Fuc-T VII CRE-like element.

CREB/ATF refers to CREB/ATF transcription factor(s). Tax, in association with CREB/ATF and the CRE-like element, creates a binding site that anchors CBP/P300 to the promoter. The initiator consensus sequence (Inr) is described in “Results” and in Figure1.