Lactose is a disaccharide involving a glycosidic linkage between
C-1 of β-D-glucopyranose and C-2 of β-D-galactopyranose
C-1 of α-D-glucopyranose and C-2 of β-D-galactopyranose
C-1 of β-D-glucopyranose and C-4 of β-D-galactopyranose
C-1 of β-D-galactopyranose and C-4 of β-D-glucopyranose
In lactose,
Galactose….C-1…..pyranose….β-form;
Glucose…. C-4…..pyranose….β-form;