2-Phenylethyl β-D-thiogalactoside (CAS 63407-54-5)

2-Phenylethyl β-D-thiogalactoside is a thioglycoside compound derived from galactose, a common component of various carbohydrate-based molecules. It is used in biochemical and molecular biology research as a substrate analogue for the detection and measurement of β-galactosidase activity. This versatile compound serves as a fundamental building block for synthesizing complex carbohydrates, including glycoproteins and glycolipids. Furthermore, it enables investigations into carbohydrate-protein interactions and the conformational changes that occur upon their binding. 2-Phenylethyl β-D-thiogalactoside finds extensive applications in scientific research. 2-Phenylethyl β-D-thiogalactoside is specifically designed to interact with the enzyme β-galactosidase. This enzyme cleaves the β-D-thiogalactoside bond, resulting in the release of the phenylethyl group. The hydrolysis of this compound by β-galactosidase is used as a reporter system in molecular biology assays, such as the blue-white screening method for identifying recombinant plasmids. By utilizing 2-Phenylethyl β-D-thiogalactoside, researchers can assess the activity of β-galactosidase in various biological samples. The presence of active β-galactosidase leads to the hydrolysis of the compound, producing a color change or fluorescence, which can be quantified to determine the enzyme′s activity level. Overall, 2-Phenylethyl β-D-thiogalactoside serves as useful in studying gene expression, protein localization, and enzyme kinetics, providing insights into various cellular processes and facilitating the identification and analysis of recombinant DNA.