Trehalose consists of two units of glucose linked by α-(1→1) glycosidic bond,then it is a disaccharide.
It is present in some fungi (Amanita spp.), in particular if young, insects, yeasts and in the Manna (dried exudates obtained from some plant species of the genus Fraxinus, especially from Orniello or ash-tree Manna, Fraxinus ornus).
In Western diet it occurs only in small amounts.

Trehalose: enzymatic cleavage

Trehalase (EC 3.2.1.28) is the specific enzyme for trehalose and leads to releasing of the two molecules of glucose that form the disaccharide.

References

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