β-半乳糖苷酶/b-Galactosidase, 25mg

β-Galactosidase

EIA grade

别名:
β galactosidase, β-galactosidase

一般描述

The GLB1 (β-Galactosidase) gene is mapped to human chromosome 3p22.3. The encoded protein belongs to glycosyl hydrolase 35 family and is localized to lysosomes.
β-Galactosidase, EIA grade, is a lyophilizate from E. coli overproducer, consisting of enzyme protein, phosphate buffer, and sucrose. Substances which could interfere with the derivatization of NH₂ or SH groups (e.g., 2-mercaptoethanol, ammonium salts, primary amines etc.) have been removed.

应用

β-Galactosidase is used for labeling enzyme immunoassay techniques. β-Galactosidase can be coupled to other proteins via its SH-groups. The reconstituted solution can be used directly for conjugation without prior dialysis or gel permeation chromatography.
β-Galactosidase has been used as a standard to determine the absolute quantitation of LacZ protein.

生化/生理作用

β-Galactosidase catalyzes the hydrolysis of terminal β-galactose residue of ganglioside substrates, such as glycoproteins, sphingolipids, and keratan sulfate and other glycoconjugates. This enzyme is associated with the mechanism of cell senescence and carcinogenesis. Mutations in the gene result in gangliosidosis, an autosomal recessive disorder, characterized with defective lysosomal storage due to accumulation of substrates. β-Galactosidase deficiency also causes Morquio B syndrome indicating skeletal abnormalities, short stature and increased excretion of keratan sulfate in urine.

质量

Purity: single peak (HPLC)