Beta-keratin
β-keratin or beta-keratin (not to be confused with β-carotene) is in contrast to alpha-keratin, a fibrous protein rich in alpha helices, rich in stacked β pleated sheets.
β-keratin adds much more rigidity to reptilian skin than alpha-keratin does to mammalian skin.
β-keratin is impregnated into the stratum corneum of the reptilian skin, providing waterproofing and the prevention of desiccation. Bird's Beaks, claws and feathers are also made from β-keratin
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Protein: fibrous proteins | |
|---|---|
| Collagen | Type-I (COL1A1) - Type-II (COL2A1) - Type-III - Type-IV - Type-V - Type XI (COL11A2) - Type-XVII - Type-XVIII |
| Keratin/Cytokeratin | type I (10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21), type II (1, 2A, 3, 4, 5, 6A, 7, 8, 9), Hair (Type I, Type II), Beta |
| other | Elastin - Cytoskeletal |
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