| 21. | The cytoplasm is released and the protein keratin is inserted.
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| 22. | Eleidin is then converted to keratin in the stratum corneum.
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| 23. | Keratinases are produced only in the presence of keratin-containing substrate.
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| 24. | The serrations probably helped anchor an even larger keratin extension.
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| 25. | Scutes : The plates made of keratin on top of the upper shell.
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| 26. | Or, rather, keratin, the protein that hair is made of.
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| 27. | The baleen of baleen whales consists of long, fibrous strands of keratin.
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| 28. | Mysticetes have large whalebone, as opposed to teeth, made of keratin.
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| 29. | Furthermore, keratin expression is helpful in determining epithelial origin in anaplastic cancers.
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| 30. | Tumors that express keratin include carcinomas, thymomas, sarcomas and trophoblastic neoplasms.
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