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Table 2 Acidification and metabolites produced by L. lactis IPLA947 and the Lcn972 resistant mutant L. lactis R5 grown in milk

From: Resistance to bacteriocin Lcn972 improves oxygen tolerance of Lactococcus lactis IPLA947 without compromising its performance as a dairy starter

L. lactis strain Acidification parametersa Residual lactose (mM) Organic acids (mM)
  Vm (mpHUnits/min) Tm (min) Te (min)   Lactic Acetic Formic
947 (WT) 3.27 ± 0.04 150 960 ± 0 103.8 ± 6.5 61.8 ± 4.2 0.68 ± 0.07 0.27 ± 0.02
R5 3.32 ± 0.11 150 1005 ± 21 91.5 ± 4.9 52.4 ± 2.5 1.01 ± 0.02 0.24 ± 0.00
  1. aVm maximum acidification rate, Tm time interval at which the maximum acidification rate was maintained, Te time to reach pH 4.6. Results are expressed as means ± standard deviation of two independent experiments