Fig. 4From: Valorization of cheese whey to lactobionic acid by a novel strain Pseudomonas fragi and identification of enzyme involved in lactose oxidationEffects of metal ions on lactobionic acid production. Reaction conditions: A, 50 g/L lactose, cell densities of 5 at OD600nm, 7.3 g/L CaCO3, with or without designated metal ions at 1 mM, 30 °C, pH 7.0, 200 rpm; B, Mg2+ in the range of 0.1 mM–2.0 mM, other conditions same as ABack to article page