G1875 Sigma

β-Galactosidase from bovine liver

Grade III, lyophilized powder, ≥0.15 units/mg protein

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Synonym: β-D-Galactoside galactohydrolase

Description

Unit Definition

One unit will hydrolyze 1.0 μmole of o-nitrophenyl β-D-galactoside to o-nitrophenol and D-galactose per min at pH 7.3 at 37 °C.

Biochem/physiol Actions

β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.

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