2-Deoxy-2-fluoro-D-galactose is a biochemical reagent used in glycobiology research. Glycobiology focuses on studying the structure, synthesis, biological function and evolution of sugars, covering carbohydrate chemistry, the formation and degradation mechanism of glycans, and the mutual recognition between proteins and glycans, and exploring the role of glycans in biological systems. This field is closely related to basic research, biomedicine and biotechnology.