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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.
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.
Hair is a protein filament that grows from follicles found in ... notably alpha-keratin. ... The growth rate of hair varies from individual to individual ...
These two categories also represent the first two categories of the superfamily of intermediate filament proteins. Keratins in this table are classified in the first two columns according to the nomenclature established in 2006. [3] Other names previously used are listed in columns 3 and 4.
16688 Ensembl ENSG00000205420 ENSMUSG00000023041 UniProt P02538 Q9Z331 Q3UV11 RefSeq (mRNA) NM_005554 NM_010669 RefSeq (protein) NP_005545 NP_034799 Location (UCSC) Chr 12: 52.49 – 52.49 Mb Chr 15: 101.58 – 101.59 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Keratin 6A is one of the 27 different type II keratins expressed in humans. Keratin 6A was the first type II keratin ...
These proteins assemble into intermediate filaments, progressively forming larger fibers. Enveloping the hair is the cuticle, composed of deceased cells. X-ray data from various samples consistently reveal specific signals associated with the coiled-coil keratin phase, intermediate filament development in the cortex, and the cell membrane complex.