Amylopectin

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Amylopectin

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Amylopectin (CAS# 9037-22-3) is a highly branched polymer of glucose found in plants. It is one of the two components of starch, the other being amylose. It is soluble in water.

Glucose units are linked in a linear way with α(1→4) bonds. Branching takes place with α(1→6) bonds occurring every 24 to 30 glucose units.

Its counterpart in animals is glycogen which has the same composition and structure, but with more extensive branching that occurs every 8 to 12 glucose units.

Plants store starch within specialized organelles called amyloplasts. When energy is needed for cell work, the plant hydrolyzes the starch releasing the glucose subunits. Humans and other animals that eat plant foods also have enzymes to hydrolyze starch.

Starch is made of about 70% amylopectin. Amylopectin is highly branched, being formed of 2,000 to 200,000 glucose units. Its inner chains are formed of 20-24 glucose subunits.

v • d • e Types of Carbohydrates
General:	Aldose \| Ketose \| Pyranose \| Furanose
Geometry	Triose \| Tetrose \| Pentose \| Hexose \| Heptose \| Cyclohexane conformation \| Anomer \| Mutarotation
Small/Large	Glyceraldehyde \| Dihydroxyacetone \| Erythrose \| Threose \| Erythrulose \| Sedoheptulose
Trioses	Ketotriose (Dihydroxyacetone) \| Aldotriose (Glyceraldehyde)
Tetroses	Erythrulose \| Erythrose \| Threose
Pentoses	Arabinose \| Deoxyribose \| Lyxose \| Ribose \| Ribulose \| Xylose \| Xylulose
Hexoses	Glucose \| Galactose \| Mannose \| Gulose \| Idose \| Talose \| Allose \| Altrose \| Fructose \| Sorbose \| Tagatose \| Psicose \| Fucose \| Fuculose \| Rhamnose
Disaccharides	Sucrose \| Lactose \| Trehalose \| Maltose
Polymers	Glycogen \| Starch (Amylose \| Amylopectin) \| Cellulose \| Chitin \| Stachyose \| Inulin \| Dextrin</td></tr>
Glycosaminoglycans	Heparin \| Chondroitin sulfate \| Hyaluronan \| Heparan sulfate \| Dermatan sulfate \| Keratan sulfate</td></tr>
Aminoglycosides	Kanamycin \| Streptomycin \| Tobramycin \| Neomycin \| Paromomycin \| Apramycin \| Gentamicin \| Netilmicin \| Amikacin</td></tr>

Major families of biochemicals</td></tr>
Peptides \| Amino acids \| Nucleic acids \| Carbohydrates \| Nucleotide sugars \| Lipids \| Terpenes \| Carotenoids \| Tetrapyrroles \| Enzyme cofactors \| Steroids \| Flavonoids \| Alkaloids \| Polyketides \| Glycosides</td></tr>
Analogues of nucleic acids:</td>	</td>	Analogues of nucleic acids:</td></tr></td></tr></table>de:Amylopektin eo:Amilopektino id:Amilopektin it:Amilopectina he:עמילופקטין nl:Amylopectine no:Amylopektin uk:Амілопектин