Fig 2.

(A to C) Growth (●, log CFU ml⁻¹; ⧫, OD₆₀₀) of Lactobacillus sakei CTC 494 in modified MRS medium supplemented with 3 g liter⁻¹ (17.2 mM) of arginine at different constant pH values: pH 5.0 (A), pH 6.0 (B), and pH 7.0 (C). (D) Growth (●, log CFU ml⁻¹; ⧫, OD₆₀₀) of L. sakei 23K in modified MRS medium supplemented with 3 g liter⁻¹ (17.2 mM) of arginine at a constant pH of 6.0. Extracellular concentrations (mM) of arginine (□), citrulline (Δ), and ornithine (○) are also shown. Data shown are representative for four independent fermentation experiments.