UDP-α-D-xylose, disodium salt, is a nucleotide sugar utilized in biochemical research for investigating glycosylation pathways and carbohydrate metabolism. It acts as a donor substrate for xylosyltransferases, facilitating the transfer of xylose residues in the biosynthesis of glycoproteins, proteoglycans, and plant cell wall polysaccharides such as xyloglucans and xylans. Commonly employed in enzyme assays to study glycosyltransferase mechanisms and specificities. Applied in studies of microbial and plant cell wall assembly, as well as mammalian extracellular matrix formation. Shows potential in research on congenital disorders of glycosylation (CDG) and therapeutic modulation of glycan structures in disease models.