Binding of WT serotype III GBS, its isogenic ΔNeuD mutant, and the ΔNeuD mutant complemented with pNeuD-K123A to hSiglec-5, -7, and -9. Values represent the means from three separate experiments ± standard deviations. P values are from two-tailed t tests comparing each sialylated GBS group with the nonsialylated negative control. O-Ac, O acetylation.