TABLE 6.

Activities of enzymes involved in the EMP pathway and the pathway leading to the biosynthesis of sugar nucleotides and EPS in cell extracts of S. thermophilus NR^a

Enzyme	Avg activity (nmol ·  mg of cell protein−1 · min−1) ± SD
α-Phosphoglucomutase	154 ± 72
β-Phosphoglucomutase	0 ± 0
UDP-glucose pyrophosphorylase	18 ± 16
UDP-galactose 4-epimerase	52 ± 28
dTDP-glucose pyrophosphorylase	0 ± 1
Dehydratase	7 ± 2
Epimerase reductase	0 ± 0
Phosphoglucose isomerase	1,687 ± 56
6-Phosphofructokinase	2,064 ± 68
Fructose 1,6-bisphosphatase	0 ± 0

^aS. thermophilus NR, a nonropy strain, was grown in batch cultures in MRS broth with 0.22 M lactose at 42°C and at a controlled pH 6.2. Samples were taken at the end of the exponential growth phase.