Figure 3. The effect of mixtures of three brewers' yeast extracts (BW4, BW5, BW6) with bakers' extracts BK1 (L), BK2 (O) or BK3 () on maximum biomass reached (OD_max) by Lactobacillus casei EQ28. Error bars represent standard error on means. For reasons of clarity, the errors bars were only illustrated on one curve, but are representative of variations for the other curves. The various YE were added at different proportions to obtain a total of 1 g/L.