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Schematic representation of the portion of U89-U90 and U91 from HHV-6A (31) amplified by PCR. The amplified DNA fragment is shown within the shaded area. U89-U90 amplified cDNAs were 789 bp (unspliced) and 682 bp (spliced); the U91 amplified cDNAs were 476 and 374 bp, respectively.
