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Virology. 1989 Oct;172(2):655-8.

Identification of an enhancer-type sequence that is responsive to Z and R trans-activators of Epstein-Barr virus.

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Department of Microbiology, Nihon University School of Medicine, Tokyo, Japan.


We studied the regulatory region of the open reading frame BHRF1 of Epstein-Barr virus (EBV) DNA that was responsive to two trans-activators (Z and R) encoded by the BZLF1 and BRLF1, respectively. The 200-bp sequence, nucleotide numbers 53,617 to 53,817 on the EBV map, was sufficient for conferring responsiveness to Z and R. This 200-bp sequence also enhanced expression of the chloramphenicol acetyltransferase (CAT) gene from the simian virus 40 promoter in response to both Z and R, even when inserted downstream of the cat gene. The results indicate that the Z and R response sequence upstream of the BHRF1 has the properties of an enhancer.

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