| 1. | Four keratin helices twist around one another to form a protofibril.
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| 2. | Regardless of the group, keratins are either acidic or basic.
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| 3. | Keratin-7 is a member of the keratin gene family.
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| 4. | Keratin-7 is a member of the keratin gene family.
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| 5. | Some types of cartilage do contain keratin as well as collagen.
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| 6. | The scale ?-keratins form the basal group in avians.
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| 7. | The nail plate is the hard keratin cover of the nail.
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| 8. | The bovids ( horns covered in a permanent sheath of keratin.
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| 9. | This group includes other structural proteins such as collagen and keratin.
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| 10. | I did not find a nail cream with keratin alone.
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