Table IV.

Distances of potential hydrogen bonds between the tetrasaccharide and 3-OST-3 protein

Saccharide	Protein contact	Distance
		Å
U4
2 O1S	Lys259 NZ	2.9
2 O1S	Gln255 NE2	3.0
2 O3S	Arg370 NH2	2.7
2 O3S	Gln255 OE1	3.1
6 O61	Lys368 NZ	2.7
6 O61	Lys215 NZ	2.7
6 O62	Arg166 NE	2.7
6 O62	Arg166 NH2	2.5
3 OH	Thr367 OG1	2.6
G3
2 N O2S	Ser218 N	3.0
2 N O6S	Lys366 NZa	2.5
6 O4S	Lys259 NZ	2.9
O6	Lys259 NZ	3.1
3 OH	Glu184 OE2	2.8
3 OH	H2O 158	3.0
I2
3 OH	Arg190 NH2	2.6
6 O61	Lys259 NZ	2.6
6 O61	Gln255 NE2	2.6
6 O62	Lys161 NZ	2.6
G1
2 N	Thr256 OG1	2.9
2 N O1S	Ser284 OG	2.9
2 N O1S	Trp283 NE1	2.9
2 N O3S	Asp252 OD1	2.8

^aThis residue is from a crystallographic symmetry related protein molecule in the crystal lattice.