Table 1. Ratios of GOS compounds expressed in a percentage of total GOS mixture as determined by relative peak heights obtained by HPAEC-PAD elution profiles (see Materials and Methods).

GOS component	Percentage (%) of total mixture Vivinal® GOS	TS0903 Purified GOS
Galactose	0.68	2.03
Glucose	15.34	3.92
β-D-Galp-(1 → 6)- β -D-Gal	0	1.32
Lactose	19.23	1.08
β-D-Galp-(1 → 4)- β -D-Gal	0.95	5.79
β-D-Galp-(1 → 6)-β-D-Galp-(1 → 4)-D-Glcp (6-galactosyl-lactose)	5.60	3.83
DP2a	27.25	7.89
Linear DP3b	14.83	29.19
Branched DP3c	4.79	6.97
Linear DP4d	6.60	17.45
Branched DP4d	1.93	10.14
≥DP5	2.80	10.35

^alactose derivatives β-D-Galp-(1 → 2)-β-D-Glc, β-D-Galp-(1 → 3)-β-D-Glc and β-D-Galp-(1 → 6)-β-D-Glc.

^bIncludes β-D-Galp-(1 → 4)-β-D-Galp-(1 → 4)-D-Glcp, β-D-Galp-(1 → 4)-β-D-Galp-(1 → 2)-D-Glcp and β-D-Galp-(1 → 4)-β-D-Galp-(1 → 3)-D-Glcp.

^cIncludes β-D-Galp-(1 → 3)-[β-D-Galp-(1 → 6)-]D-Glcp, β-D-Galp-(1 → 2)-[β-D-Galp-(1 → 6)-]D-Glcp and β-D-Galp-(1 → 4)-[β-D-Galp-(1 → 2)-]D-Glcp.

^dCorresponding DP3 compounds with an additional β-D-Galp-(1 → 4)- at the non-reducing end.