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Analysis of quasispecies variations. Shown is a phylogenetic tree of the 5′ UTR quasispecieses in the five nonresponder samples studied BT and AT. The values for genetic distance between isolates are as follows: S2BT, 0.00381; 3a, 0.01702; 3b, 0.00624; S7AT, 0.01178; S2AT, 0.00214; S4AT, 0.00214; S4BT, 0.00206; S3BT, 0.00000; S3AT, 0.00000; 1a, 0.00000; S7BT, 0.00333; S11BT, 0.00000; S11AT, 0.00000; and 1b, 0.00000.
