β-Galactosidase
Product name: β-Galactosidase from Aspergillus oryzae
Synonym(s): β-D-Galactoside galactohydrolase, Lactase from Aspergillus oryzae
CAS Number: 9031-11-2
Introduction
| Product Name | Lactase; β-Galactosidase |
| Items | Specifications |
| Appearance | White to off white powder |
| Particle size | ≥95% pass 80 mesh |
| Assay | ≥100,000 ALU/g |
| Loss on drying | ≤5.00% |
| Total plate count | ≤1,000 CFU/g |
| Mold and Yeast | ≤100 CFU/g |
| Escherichia coli | Negative |
| Salmonella (10g) | Negative |
| Heavy Metal | ≤5 ppm |
General description
β-Galactosidase is a member of the glycoside hydrolase clan A (GH-A) family. It is widely present in microorganisms, which includes both prokaryotes and eukaryotes.
Biochem/physiol Actions
β-Galactosidase acts on the terminal β-D-galactosyl moieties of disaccharides, glycoconjugates, and polysaccharides. It is useful in mediating transglycosylation reactions such as the synthesis of galactooligosaccharides (GOS). β-Galactosidases might be used for glycobiological and biotechnological applications.
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.
Unit Definition
One unit will hydrolyze 1.0 μmole of lactose per minute at pH at 4.5 at 30 °C.