Figure 1. . In vitro competition between Streptococcus pneumoniae EF3030 and the Phe/Phe mutant (A) and between EF3030 and the Phe/Tyr mutant (B) in liquid medium (broth). Bars indicate medians. Lines connect strains competing in the same broth. p values were calculated by the Wilcoxon matched-pairs signed-rank test.
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