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. 1984 Jan;157(1):28–34. doi: 10.1128/jb.157.1.28-34.1984

Properties of a Streptococcus lactis strain that ferments lactose slowly.

V L Crow, T D Thomas
PMCID: PMC215124  PMID: 6418719

Abstract

Streptococcus lactis 7962, which ferments lactose slowly, has a lactose phosphoenolpyruvate-dependent phosphotransferase system and low phospho-beta-galactosidase activity, in addition to high beta-galactosidase activity. Lactose 6'-phosphate accumulated to a high concentration (greater than 100 mM) in cells growing on lactose. In contrast, lactic streptococci, which ferment lactose rapidly and use only the lactose-phosphotransferase system for uptake, contained high phospho-beta-galactosidase activity and low concentrations (0.9 to 1.6 mM) of lactose 6'-phosphate. It is concluded that rate-limiting phospho-beta-galactosidase activity is primarily responsible for defective lactose metabolism in S. lactis 7962.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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