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

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

L. lactis strain	Acidification parameters^a			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

^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

ISSN: 1471-2180