Chapter 8 (part2) Carbohydrates: oligo- and polysaccharides.

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Carbohydrates: Oligosaccahrdes and Polysaccharides.

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Presentation transcript:

Chapter 8 (part2) Carbohydrates: oligo- and polysaccharides

Glycosidic Linkage

Disaccharides maltose cellobiose lactose sucrose  -D-glucosyl-(1->4)-  -D-glucopyranose)  -D-glucosyl-(1->4)-  -D-glucopyranose)  -D-galactosyl-(1->4)-  -D-glucopyranose)  -D-glucosyl-(1->2)-  -D-fructofuranose)

Higher Oligosaccharides

Oligosaccharide groups are incorporated in to many drug structures

Polysaccharides

Amylose and Amylopectin

Iodine binding to starch

glycogen

Dextrans

Cellulose

Cellulose vs Amylose Glucose units rotated 180 o relative to next residue cellulose amylose

Cellulose

Chitin

Chitin vs Cellulose

Glycoproteins

O-linked Glycoproteins

Blood ABO Antigens Structure of the ABO blood group carbohydrates, R represents the linkage to protein in the secreted forms, sphingolipid in the cell-surface bound form open square = GlcNAc, open diamond = galactose, filled square = fucose, filled diamond = GalNAc, filled diamond = sialic acid (NANA)

N-linked Glycoproteins