Appl Environ Microbiol. 1977 Jan;33(1):15-8.

Deconjugation of bile acids by intestinal lactobacilli.

Abstract

Lactobacillus species normally found in the intestinal tract of humans varied in the ability to deconjugate bile acids, whereas laboratory strains of Lactobacillus acidophilus deconjugated both glycocholate and taurocholate. All isolates of L. acidophilus from human feces deconjugated taurocholate, whereas only one of six deconjugated glycocholate. None of 13 isolates identified as L. casei deconjugated taurocholate, whereas 9 deconjugated glycocholate. The deconjugating system of L. acidophilus appeared to be constitutive, required low oxidation-reduction potential, and was most active at pH 6. No degradation beyond deconjugation was detected.

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