Phenyl β-D-thioglucuronide is a class of biochemical reagents used in glycobiology research. Glycobiology focuses on the structure, synthesis, biology, and evolution of carbohydrates. The field encompasses carbohydrate chemistry, the enzymology of glycan formation and degradation, protein-glycan interactions, and the role of glycans in biological systems. It is closely connected to fundamental research, biomedical applications, and biotechnology.