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Representative sample of Northern blot analysis of total RNA isolated from hyperplastic tissue. WEHV1 (top)- and WEHV2 (bottom)-specific pol probes were used for hybridization. Hyperplastic tissue samples (lanes 1 to 4). Each sample contains two or three lesions collected from an individual fish. RNA isolated from uninvolved skin and muscle (lanes 5 and 6) from the fish lesion is shown in lane 1.
