Figure 5

Separate amplification on selective hosts. Amplifications of T7₀ and T7E₁ on the capsulated host (EV36 in M9) when grown in physical isolation of each other. There is a superiority of T7E₁ at all initial phage densities tested, although the difference is (highly) statistically significant at only the 3 highest densities in individual, 2-tailed t-tests (tests were performed on differences between each pair of T7₀ and T7E₁ samples most similar in initial density). This assay demonstrates that the endosialidase protein enhances phage growth on the capsulated host. Amplifications here are lower than in Figure 4 because the host and media used here (M9 glucose) are not as conducive to cell growth. Assays were paired, so that T7E₁ and T7₀ amplification samples were taken from different zones on the same plates. Bars span 2 standard errors.