TABLE 2.

Summary of the Φ and Ψ angle in the solution and crystal structures of HS and heparin

	GlcA-GlcNAc		GlcNAc-GlcA
	Φ	Ψ	Φ	Ψ
	degrees		degrees
HS crystal structurea	−90 ± 1	127 ± 4	83 ± 3	94 ± 1
HS dp6	−101 ± 38	140 ± 19	−16 ± 27	129 ± 48
HS dp8	−93 ± 26	121 ± 29	34 ± 55	152 ± 15
HS dp10	−121 ± 26	126 ± 17	18 ± 41	143 ± 23
HS dp12	−78 ± 30	114 ± 26	24 ± 35	121 ± 30
HS dp14	−64 ± 32	149 ± 21	−12 ± 53	139 ± 42
HS dp16	−112 ± 38	136 ± 45	−11 ± 88	143 ± 52
Average (27 of 35 values)	−93 ± 36	134 ± 32	4 ± 58	138 ± 37

	IdoA-GlcNS		GlcNS-IdoA
	Φ	Ψ	Φ	Ψ
19 heparin crystal structures	−79 ± 20	132 ± 19	84 ± 22	100 ± 19
Heparin dp18	−52 ± 22	135 ± 15	104 ± 27	96 ± 25
Heparin dp24	−61 ± 17	127 ± 20	100 ± 26	78 ± 17
Heparin dp30	−64 ± 21	136 ± 21	87 ± 25	82 ± 22
Heparin dp36	−63 ± 23	129 ± 27	103 ± 22	89 ± 24
Average (50 of 54 values)	−61 ± 21	132 ± 22	98 ± 25	86 ± 22

^a The mean value from two HS dp4 molecules seen in the crystal structure (Protein Data Bank code 3E7J).