A2[3]G1 N-glycan

A2G1 N-glycan is a Lewis X (LeX) polysaccharide with two asymmetric antennae and serves as a precursor to A2G1F1 (a1-3) and asymmetric biantennary N-glycan. SLeX, a ligand for the cell adhesion molecule E-selectin, is specifically expressed at sites of inflammatory lesions. Conjugates of SLeX polysaccharides are designed to deliver drugs to these inflammation sites.