keratin


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ker·a·tin

 (kĕr′ə-tĭn)
n.
1. Any of a class of filamentous proteins that are abundant in the cytoskeleton of vertebrate epithelial cells and are the main constituents of the outer layer of skin and tough epidermal structures such as hair, nails, hooves, feathers, and claws.
2. Material composed principally of keratin proteins.

[Greek keras, kerāt-, horn; see ker- in Indo-European roots + -in.]

ke·rat′i·nous (kə-răt′n-əs) adj.

keratin

(ˈkɛrətɪn) or

ceratin

n
(Zoology) a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc

ker•a•tin

(ˈkɛr ə tɪn)

n.
a tough, insoluble protein that is the main constituent of hair, nails, horn, hoofs, etc., and of the outermost layer of skin.
[1840–50; < Greek kerat-, s. of kéras horn + -in1]
ker`a•tin•i•za′tion, n.
ker′a•tin•ize`, vb
ke•rat•i•nous (kəˈræt n əs) adj.

ker·a·tin

(kĕr′ə-tĭn)
A tough, fibrous protein that is the main structural component of hair, nails, horns, feathers, and hooves.
Did You Know? Nature ingeniously uses the same chemicals to perform a wide variety of functions in living things. An example is the group of closely related proteins known as the keratins. When nature wants something hard and tough for an animal, it turns to keratins. Your nails and hair are made mostly of a kind of keratin, and so are a dog's claws, a bird's beak, and a goat's horns. Even the hard material called baleen that some whales have in their mouths to help them eat is made of a variety of keratin. All proteins are strings of amino acids, and the keratins' secret is the amino acid known as cysteine. This amino acid tends to form strong bonds with other cysteines in the protein. The different keratins vary in hardness, depending on how many cysteine bonds are present. The bonds are what make the keratins tough as, well, nails.

keratin

A hard, waterproof protein found in the epidermis, hair, and nails.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.keratin - a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves
feather, plumage, plume - the light horny waterproof structure forming the external covering of birds
hair - a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss; "he combed his hair"; "each hair consists of layers of dead keratinized cells"
horn - the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails
albuminoid, scleroprotein - a simple protein found in horny and cartilaginous tissues and in the lens of the eye
Translations

keratin

[ˈkɛrətɪn] ncheratina

ker·a·tin

n. queratina, proteína orgánica insoluble, elemento componente de las uñas, la piel y el cabello.

keratin

n queratina
References in periodicals archive ?
We have incorporated keratin, fish oil omega 3, and snake oil into our new range of shampoos to offer solutions for hair fall problems, split ends, dullness and bring new life and confidence to our consumers.
The exact pathogenesis of EVHC has not been fully elucidated, although an autosomal dominant mode of inheritance has been reported in some cases, and an association with mutations in genes encoding keratin 17 and keratin 6b has been noted.
Meanwhile, European researchers identified KLHL24 mutations in families from Finland, Germany, Israel, Italy, Switzerland, and Qatar and confirmed that these mutations affect the equilibrium between intermediate keratin filaments and keratin breakdown that is necessary for skin integrity (Am J Hum Genet.
Isolation, screening identification, heavy metal tolerance and antibiotic resistance of keratin degrading bacterial strain
Cashmere has a very good textile performance, which is closely related to the keratin component and structure.
It is associated with mutations in five keratin genes viz.
With a keratin-infused formula, TRESemme Keratin Smooth controls frizz for up to 48 hours.
10) Keratin production also diminishes in hair follicles.
1-5) An epidermal cyst rarely calcifies, but when it does, it is usually in older cysts within the keratin debris.
KRT1 is a major epithelial keratin and western blotting confirmed its significantly lower expression after periodic oxidative challenge (Figure 6(b)(III)).
Keratin 17 (K17), a protein previously believed to provide only mechanical support for cancer cells, appears to play a crucial role in degrading a key tumor suppressor protein in cancer cells called p27.
Keratin hair straightening products contains cancer causing substance formaldehyde above the permissible limit, warns Dubai Municipality.