GalNAc-b1,3-Gal;  b-D-N-Acetylgalactosaminyl 1-3 galactose;

3-O-(2-Acetamido-2-deoxy-b-D-galactopyranosyl)-D-galactopyranose

3-O-(2-Acetamido-2-deoxy-b-D-galactopyranosyl)-D-galactopyranose is a sugar molecule with biological properties such as lectin, terminal sugar, and carbohydrate. It is a specific sugar for the blood group B. This sugar is also used in assays for pneumococcus, which is a bacterium that can cause pneumonia. 3-O-(2-Acetamido-2-deoxy-b-D-galactopyranosyl)-D-galactopyranose is oxidized by enzymes called oxidases to form 3,4,6 -triacetamido galactose (3TAG) and 3,4,6 -triacetamido glucose (3TG). The disaccharide residues are then hydrolyzed into monosaccharides by glycoconjugates and polyvalent glycosidases.