Glycolysis and the regulation of glucose transport in Lactococcus lactis spp. lactis in batch and fed-batch culture

Table 1 Maximum specific growth rate and yield coefficients at different aeration conditions*

Aeration conditions	Growth rate (h^-1)	Yield on glucose of:
			Products (C-mol of product · 100 C-mol of glucose ^-1)
		Biomass (g [dry wt] of cells · g of glucose^-1)	Lactate	Formate	Acetate	Pyruvate	Ethanol
Anaerobic	0.925 ± 0.009	0.162 ± 0.003	92.3 ± 1.3	1.5 ± 0.5	1.5 ± 0.1	0	1.5 ± 0.5
Microaerobic	0.800 ± 0.051	0.151 ± 0.002	96.0 ± 0.5	0	1.1 ± 0.2	0.21 ± 0.02	0.21 ± 0.06
Semiaerobic	0.752 ± 0.007	0.170 ± 0.005	93.2 ± 1.4	0	2.1 ± 0.5	0.10 ± 0.02	0
Aerobic	0.712 ± 0.009	0.182 ± 0.005	91.0 ± 1.5	0	3.2 ± 0.5	0.06 ± 0.03	0

*The values are means ± standard deviations for three independent cultivations. The yield coefficients for biomass, lactate, formate and ethanol were obtained from plots of the amount of accumulated products against the amount of glucose consumed during the exponential phase. Pyruvate was determined at the end of runs and the yield coefficient was calculated on the basis of end concentrations.

ISSN: 1475-2859