Table 1.

Predicted H-bond distances between homologous A111/114R residues and nucleotide–sugar ligand.

	A111/114R Residues	H-Bond Distance of Nucleotide-Sugar (Å)
Domain 1	Tyr-83	<4
	Asp-85	2.6, 3.0, 3.6
	Asn-149	<4
	Ala-150	<4
	Asp-193	2.4, 2.5
	Gln-194	<4
Domain 2	Pro-265	2.8, 3.3
	Asp-294	<4
	Asn-323	<4
	Gly-328	<4
	Asp-351	3.2, 3.3
	Asp-353	<4
	Asp-447	<4
Domain 3	Leu-617	<4
	Val-684	<4
	Arg-693	<4
	Gly-711	<4
	Asn-749	1.6, 3.1, 3.3
	Tyr-755	1.9, 3.4
	Ser-757	<4
	Glu-758	2.2
	Lys-759	2.5
	Asp-762	<4