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Microscopy of keratin filaments inside cells. Keratin (/ ˈ k ɛr ə t ɪ n / [1] [2]) is one of a family of structural fibrous proteins also known as scleroproteins. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin in vertebrates.
Alpha-keratin, or α-keratin, is a type of keratin found in mammalian vertebrates. This protein is the primary component in hairs , horns , claws , nails and the epidermis layer of the skin . α-keratin is a fibrous structural protein , meaning it is made up of amino acids that form a repeating secondary structure.
Horns consist of keratin, and the term "horn" is used to refer to this material, sometimes including similarly solid keratin from other parts of animals, such as hoofs. Horn may be used as a material in tools, furniture and decoration, among other uses.
2.1 Human epithelial keratin. 2.2 Human hair keratins. 2.3 Human keratin pseudogenes. 3 See also. ... Other names previously used are listed in columns 3 and 4. Type ...
A Civatte body (named after the French dermatologist Achille Civatte, 1877–1956) [36] is a damaged basal keratinocyte that has undergone apoptosis, and consist largely of keratin intermediate filaments, and are almost invariably covered with immunoglobulins, mainly IgM. [37]
Keratin is a crucial fibrous protein found in animals, constituting tough structures like hair, feathers, nails, and horns. It's classified based on tissue origin and sulfur content: soft keratins have lower sulfur, while hard keratins, found in hair and claws, contain more sulfur, creating a stronger structure. [ 2 ]
Reduces symptoms of keratosis pilaris (KP): Keratosis pilaris is a condition that’s characterized by bumpy skin on the arms, legs, or butt, and it's caused by a buildup of keratin in the hair ...
Scutes on a crocodile. Reptile skin is covered with scutes or scales which, along with many other characteristics, distinguish reptiles from animals of other classes. They are made of alpha and beta-keratin and are formed from the epidermis (contrary to fish, in which the scales are formed from the dermis).