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| | MSN Encarta - Search Results - keratin |
 | | Keratin, highly fibrous and resistant protein that makes up most of the material in the cells forming the epidermis, hair, nails, scales, feathers,... |
 | | All birds are covered with feathers, collectively called plumage, which are specialized structures of the epidermis, or outer layer of skin. |
 | | About 90 percent of the cells in the epidermis are keratinocytes, named because they produce a tough, fibrous protein called keratin. |
| ca.encarta.msn.com /keratin.html (94 words) |
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