FIG. 1.

Schematic of the DEN-2 RNA genome showing (from top to bottom) the genome organization, the RT-PCR strategy (overlapping PCR fragments are shown as blocks), and the sequencing strategy. Arrows pointing to the right indicate regions sequenced 3′→5′ on the minus-sense strand; arrows pointing to the left indicate regions sequenced 3′→5′ on the plus-sense strand. UTR, untranslated region.