What is the function of beta galactosidase?
Category:
medical health
digestive disorders
β-galactosidase, also called lactase, beta-gal or β-gal, is a glycoside hydrolase enzyme that catalyzes the hydrolysis of β-galactosides into monosaccharides through the breaking of a glycosidic bond. β-galactosides include carbohydrates containing galactose where the glycosidic bond lies above the galactose molecule.
Consequently, where is beta galactosidase found?
lysosomes
Phosphate buffer, per 100 mL:
- 1.61g Na2HPO4.
- 0.55g NaH2PO4.
- adjust the pH to 7.0.
- phosphate buffer is stable at room temperature and does not need to be made fresh each time.
In respect to this, how does E coli use the B galactosidase enzyme?
In E. coli, this enzyme is an important catalyst in the breakdown of the 12 carbon sugar lactose into two 6 carbon sugars, glucose and galactose. If lactose is added to the growth medium there is a gradual accumulation of β-galactosidase within the bacterium.
ortho-Nitrophenyl-β-galactoside (ONPG) is a colorimetric and spectrophotometric substrate for detection of β-galactosidase activity. This compound is normally colorless. However, if β-galactosidase is present, it hydrolyzes the ONPG molecule into galactose and ortho-nitrophenol.