910743.fig.001a
(a)
910743.fig.001b
(b)
Figure 1: Generic disaccharide backbone structure of glycosaminoglycans with (a) 1–4 linkage, common to heparin and heparan sulphate and (b) 1–3 linkage, common to chondroitin and dermatan sulphates. Numbers on the rings relate to the carbon position, hydroxyl, and amine groups can be sulphated and alternatively orientated.