Whey Protein

Whey Protein

Neben der Fraktion der Kaseine stellen die Molkenproteine die zweite, wichtige Eiweißfraktion der Milch von Säugetieren dar. Gesamt ca. 3,3 % Eiweiß der Kuhmilch setzt sich dabei aus ca. 2,7 % Kasein und ca. 0,6 % Molkenprotein zusammen. Die Bezeichnung Molkenprotein wird aus dem Umstand abgeleitet, dass die Proteine dieser Fraktion Hauptbestandteil des Eiweißes in Molke sind.

Molkenproteine sind eine Gruppe verschiedener Albumine und Globuline. Im einzelnen sind dies:[1]

  • beta-Lactoglobulin ca. 45 Prozent (0,25 % der Milch)
  • alpha-Lactalbumin ca. 20 Prozent (0,1 % der Milch)
  • Serumalbumin ca. 5 Prozent
  • Proteosepepton ca. 20 Prozent
  • Immunoglobuline ca. 10 Prozent

Molkenproteine sind hitzeempfindlich. Beim Aufkochen von Milch ist insbesondere das alpha-Lactalbumin für die Haut auf der Oberfläche verantwortlich. Molkenproteine werden als ernährungsphysiologisch hochwertig eingestuft (hohe biologische Wertigkeit). Sie sind daher Hauptbestandteil der Eiweißpräparate zum Muskelaufbau.

Einzelnachweise

  1. Hans-Dieter Belitz, Werner Grosch, Peter Schieberle (Hrsg.): Lehrbuch der Lebensmittelchemie. Edition: 5, Springer, 2001, S. 494. ISBN 3-540-41096-1

Wikimedia Foundation.

Игры ⚽ Поможем решить контрольную работу

Schlagen Sie auch in anderen Wörterbüchern nach:

  • Whey protein — is the collection of globular proteins that can be isolated from whey, a by product of cheese manufactured from cow s milk. It is typically a mixture of beta lactoglobulin ( 65%), alpha lactalbumin ( 25%), and serum albumin ( 8%), which are… …   Wikipedia

  • whey protein powder — išrūgų baltymų milteliai statusas Aprobuotas sritis pienininkystė apibrėžtis Gaminys, gaunamas išdžiovinus baltymų junginius, cheminiu ar fiziniu būdu ekstrahuotus iš išrūgų. atitikmenys: angl. whey protein powder vok. Molkeeiweißpulver pranc.… …   Lithuanian dictionary (lietuvių žodynas)

  • Protein (disambiguation) — Protein is a class of biomolecules composed of amino acid chains.Protein may also refer to:Biochemistry* Antifreeze protein, class of polypeptides produced by certain fish, vertebrates, plants, fungi and bacteria * Conjugated protein, protein… …   Wikipedia

  • Protein efficiency ratio — (PER) is based on the weight gain of a test subject divided by its intake of a particular food protein during the test period.From 1919 until very recently, the PER had been a widely used method for evaluating the quality of protein in food.In… …   Wikipedia

  • Whey — For the radio station licensed to North Muskegon, Michigan, United States, see WHEY. Whey, sweet, fluid Whey collecting as newly made cheese drains Nutritional value per 100 g (3.5 oz) Energy 112 kJ (27 k …   Wikipedia

  • Protein in nutrition — Proteins are broken down in the stomach during digestion by enzymes known as proteases into smaller polypeptides to provide amino acids for the organism, including the essential amino acids that the organism cannot biosynthesize itself. Aside… …   Wikipedia

  • Whey Acidic Protein — (WAP) is the major milk protein in certain mammals. It has been found in two monotremes, three marsupials, rodents, rabbits, pigs and camel. Despite extensive studies it has not been found in ruminants and humans. Whey Acidic Protein contains two …   Wikipedia

  • protein — proteinaceous /proh tee nay sheuhs, tee i nay /, proteinic, proteinous, adj. /proh teen, tee in/, n. 1. Biochem. any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the… …   Universalium

  • Protein requirements, infant — Proteins contain different amino acids that are linked together. Proteins provide both calories and the amino acid building blocks that are necessary for proper growth. The protein in human milk provides between 10% 15% of an infant s daily… …   Medical dictionary

  • Protein — A large molecule composed of one or more chains of amino acids in a specific order determined by the base sequence of nucleotides in the DNA coding for the protein. Proteins are required for the structure, function, and regulation of the body s… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”