| Section2 = }} Fucose's a hexose deoxy sugar with the chemical formula C6H12O5. It's found on N-linked glycans on the mammalian, insect and plant cell surface, and's the fundamental sub-unit of the fucoidan polysaccharide. Alpha1→3 linked core fucose's a suspected carbohydrate antigen for IgE-mediated allergy. Two structural features distinguish fucose from other six-carbon sugars present in mammals: the lack of a hydroxyl group on the carbon at the 6-position (C-6) and the L-configurati… (More on Fucose)