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. 2019 Jul 8;9:9867. doi: 10.1038/s41598-019-46344-z

Figure 2.

Figure 2

(a) GFP signal of L. lactis MG1363 at different extracellular pH values. Stationary L. lactis MG1363_GFP cells were measured before and after uncoupling their pH gradient. Some error bars (SEM, n = 3) are too small to be visible. (b) Correlation between the ability to grow and the ability to maintain a pH gradient. For mixtures of living (stationary) and heat-killed cells we measured the ability to grow on agar plates and the ability to maintain a pH gradient by looking at their GFP fluorescence at pH 4.5. As controls we measured the fluorescence at pH 7.5 and the fluorescence after uncoupling the pH gradient. Some error bars (SD, n = 3) are too small to be visible.