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Vpr-tat intergenic region in SIVdeb. SIVdeb vpr (red) and first exon of tat (green) genes are separated by a 19-bp noncoding sequence (black) in two different SIVdeb strains (CM5 and CM40). The deduced amino acid sequences of the C terminus of Vpr and the N terminus of Tat are indicated. SA indicates the splice acceptor site for the tat mRNA.
