Figure 4. The effect of mixtures of three brewers' yeast extracts (BW4, BW5, BW6) with bakers' extracts BK1 (Δ), BK2 (O) or BK3 () on maximum biomass reached (OD_max) by Pediococcus acidilactici 18/5M. Error bars represent standard error on means. For reasons of clarity, the errors bars are only illustrated on one curve, but arerepresentative of variations for the other curves. The various YE were added at different proportions to obtain a total of 2 g/L.