Abstract

β-Galactosidase (β-gal) and 6-phospho-β-galactosidase (P-β-gal) activities were measured in a total of 34 strains from Lactobacillus acidophilus, Lactobacillus crispatus, Lactobacillus amylovorus, Lactobacillus gasseri and Lactobacillus johnsonii. The Lact. gasseri strains have P-β-gal but little or no β-gal activities. The strains from other species have β-gal but only very little P-β-gal activities.

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