Table 2.

Effects of (1,3;1,4)-β-glucan fine structure on solubility.

Species	Cellotriosyl:cellotetraosyl ratio	Solubility
Equisetum fluviatile (horsetail fern)	0.1:1.0	Low solubility (mostly cellotetraosyl units)
Avena sativa (oats)	1.5:1.0 to 2.3:1.0	Ratio in grain approx. 2.0:1.0 Approx. 80% soluble in H2O at 40°C Comprises 3.8–6.1% (w/w) of grain
Hordeum vulgare (barley)	1.8:1.0 to 3.5:1.0	Ratio in grain approx. 2.5:1.0 Approx. 20% soluble in H2O at 40°C Comprises 2–10% (w/w) of grain
Triticum aestivum (wheat)	3.0:1 to 4.5:1.0	Ratio in grain approx. 2.8:1.0 Essentially insoluble in H2O at 40°C Comprises 0.5–2.3% (w/w) of grain
Cetraria islandica (Icelandic moss)	20.2:1 to 24.6:1.0	Low solubility (mostly cellotriosyl units)
Rhynchosporium secalis (barley scald fungus)	More than 10.0:1.0	Low solubility (mostly cellotriosyl units)