Consumption of ammonium and amino acids by strain EC1118 during fermentation in SM200E. Residual concentrations of Lys, Asp, Thr, Glu, Leu, His, Met, Ile, Ser, Gln, and Phe are shown by the solid lines and symbols indicated in the key, and concentrations of NH4+, Val, Arg, Ala, Trp, Tyr, and Gly are shown with dashed lines and the indicated symbols. Residual concentrations are expressed as percentages of the initial concentrations. Results of one representative experiment of five are shown.