Letter G

Galactose

A sugar contained in milk.

Galactose makes up half of the sugar called lactose that is found in milk.

Lactose is called a disaccharide, di meaning 2, since lactose is made up of two sugars, galactose and glucose, bound together.

Galactose is metabolized (used) through the action of an enzyme called GALT (galactose-1-phosphate uridyl transferase).

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