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Effects of deletion of VicRSm downstream genes (smaA, smu2146, smu.399 and pepO) on C3b deposition, binding to serum IgG and opsonophagocytosis by PMN. Measures obtained for mutant and complemented strains were expressed in relation to UA159 (set to 100%). Asterisks indicate significant differences in relation to parent strain (Kruskal-Wallis with post hoc Dunn’ test; p<0.05).
