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Sialic acid dependence of genotype I and genotype IV VP1 variants. Percentage inhibition of infectious entry of wild-type and V72Q73Q82 genotype Ib2 PSV (A), and S61 and S61K69A73N77 genotype IVc2 PSV into 293TT and RS cells (B). One of three independent experiments is shown, with groups compared by two-tailed t-test. ** p < 0.01.
