TABLE 3.

Enzyme activities in cell-free extracts of the strains used in this study^a

Strain	Enzyme activity (U/mg protein)
	LDH		GPT	GDH
	Pyruvate as substrate	Lactate as substrate
M. gubbeenense DPC 5286	0.19 ± 0.031	0.121 ± 0.0029	0.155 ± 0.0484	NDb
C. casei DPC 5298	0.99 ± 0.057	0.022 ± 0.0011	0.097 ± 0.0238	ND
C. variabile DPC 5310	0.11 ± 0.005	0.046 ± 0.0024	0.177 ± 0.0157	ND
B. aurantiacum 1-16-58	ND	0.065 ± 0.0007	0.210 ± 0.0095	ND
S. saprophyticus 4E61	0.12 ± 0.013	0.010 ± 0.0003	0.042 ± 0.0198	0.065 ± 0.0084

^aUrease activity was not detected in any strain.

^bND, not detected.