Table 1. Residue abundance/substitution data for glycosaminoglycans (expressed per 100 disaccharides).

	p-HS*	dnsp-HP*	p-HP†	b-HP†	HA
GlcNH2	1.7	12.5	0	0	0
GlcNSO3	43.4	76.1	88.6	97.7	0
GlcNAc	55.0	11.4	11.4	2.3	100
2-O-sulphate	19.9	75.6	75.6	89.3	0
6-O-sulphate	21.9	81.5	81.5	92.4	0
Average molecular mass of disaccharide (Da)‡	470	607	615	645	401

* Data from [25], except for abundance of GlcNH₂, which was determined as described in the text; an additional preparation of dnsp-HP used was determined to have the following glycosamine residue abundances (residues per 100 disaccharides): GlcNH₂, 17.1; GlcNSO₃, 71.5; and GlcNAc, 11.4 (average molecular mass of disaccharide 604 Da).

† Data from [25].

‡ Calculated with respect to dry weight on the basis of the abundance/substitution data; carboxylate and sulphate groups were assumed to have sodium (Na⁺) counter-ions, and free amine groups were assumed to exist as hydrochloride (HCl) salts.