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  2. Hair keratin - Wikipedia

    en.wikipedia.org/wiki/Hair_keratin

    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]

  3. Keratin - Wikipedia

    en.wikipedia.org/wiki/Keratin

    Keratin. Keratin (/ ˈkɛrətɪn / [1][2]) is one of a family of structural fibrous proteins also known as scleroproteins. Alpha-keratin (α-keratin) is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin among vertebrates.

  4. Hyperkeratinization - Wikipedia

    en.wikipedia.org/wiki/Hyperkeratinization

    Specialty. Dermatology. Hyperkeratinization (American English or hyperkeratinisation in British) is a disorder of the cells lining the inside of a hair follicle. It is the normal function of these cells to detach or slough off (desquamate) from the skin lining at normal intervals. The dead cells are then forced out of the follicle (primarily by ...

  5. Hyperkeratosis - Wikipedia

    en.wikipedia.org/wiki/Hyperkeratosis

    Hyperkeratosis is thickening of the stratum corneum (the outermost layer of the epidermis, or skin), often associated with the presence of an abnormal quantity of keratin, [1] and is usually accompanied by an increase in the granular layer. As the corneum layer normally varies greatly in thickness in different sites, some experience is needed ...

  6. Keratinocyte - Wikipedia

    en.wikipedia.org/wiki/Keratinocyte

    Keratinocyte. Keratinocytes are the primary type of cell found in the epidermis, the outermost layer of the skin. In humans, they constitute 90% of epidermal skin cells. [1] Basal cells in the basal layer (stratum basale) of the skin are sometimes referred to as basal keratinocytes. [2] Keratinocytes form a barrier against environmental damage ...

  7. Uncombable hair syndrome - Wikipedia

    en.wikipedia.org/wiki/Uncombable_hair_syndrome

    Uncombable hair syndrome (UHS) is a rare structural anomaly of the hair with a variable degree of effect. It is characterized by hair that is silvery, dry, frizzy, wiry, and impossible to comb. [4] It was first reported in the early 20th century. [5] It typically becomes apparent between the ages of 3 months and 12 years. [6]