Amylopectin (CAS# 9037-22-3) is a highly branched
polymerof glucosefound 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
glycogenwhich has the same composition and structure, but with more extensive branching that occurs every 8 to 12 glucose units.
Plants store starch within specialized
organellescalled amyloplasts. When energyis needed for cell work, the plant hydrolyzes the starch releasing the glucose subunits. Humansand other animals that eat plant foods also have enzymesto hydrolyze starch.
Starch is made of about 70% amylopectin by weight. Amylopectin is highly branched, being formed of 2,000 to 200,000 glucose units. Its inner chains are formed of 20-24 glucose subunits.
* [http://www.starch.dk/isi/starch/starch.htm International Starch Institute]
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Amylopectin — ⇒ Stärke … Deutsch wörterbuch der biologie
amylopectin — [am΄ə lō pek′tin] n. a nearly insoluble substance derived from the outer part of starch granules: it is a polymer of glucose: see also AMYLOSE (sense 1) … English World dictionary
amylopectin — amilopektinas statusas T sritis chemija apibrėžtis Šakotasis polisacharidas, sudarytas iš D gliukozės liekanų, sudedamoji krakmolo dalis. atitikmenys: angl. amylopectin rus. амилопектин … Chemijos terminų aiškinamasis žodynas
amylopectin — noun Date: 1905 a component of starch that has a high molecular weight and branched structure and does not tend to gel in aqueous solutions … New Collegiate Dictionary
Amylopectin — Ausschnitt aus einem Amylopektinpolymer (Haworth Schreibweise) Ausschnitt aus einem Amylopektinpolymer (Sessel Schreibweise) Amylopek … Deutsch Wikipedia
amylopectin — Component of starch in which glucose chain is a 1,4 linked ( a 1,6 at branch points) … Dictionary of molecular biology
amylopectin — /am euh loh pek tin/, n. the insoluble or gel component of starch that forms a paste with water, but does not solidify, and that turns red in iodine. Cf. amylose. [1900 05; AMYLO + PECTIN] * * * … Universalium
amylopectin — noun A highly branched, insoluble form of starch (the soluble form being amylose) … Wiktionary
amylopectin — A branched chain polyglucose (glucan) in starch containing both 1,4 and 1,6 linkages. Cf.:amylose. * * * am·y·lo·pec·tin .am ə lō pek tən n a component of starch that has a high molecular weight and branched structure and does not tend to gel in… … Medical dictionary
amylopectin — n. ingredient of amylum … English contemporary dictionary