p-Aminophenyl β-D-lactopyranoside is a biochemical reagent used in glycobiology research. Glycobiology examines the structure, synthesis, biology, and evolution of sugars. The field encompasses carbohydrate chemistry, glycan formation and degradation enzymology, protein-glycan recognition, and the role of glycans in biological systems. It is closely linked to fundamental research, as well as the biomedical and biotechnology sectors.