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A domestic cat's retractable claw in protracted position
A domestic cat's retractable claw in protracted position
A claw sheath from a cat
A claw sheath from a cat
At just under a meter, the claws of Therizinosaurus are among the largest recorded.
At just under a meter, the claws of Therizinosaurus are among the largest recorded.
Using its claws for anchoring, a green lizard basks.
Using its claws for anchoring, a green lizard basks.
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The horns of the impala are made of keratin covering a core of bone.
The horns of the impala are made of keratin covering a core of bone.
Protein sequence alignment of human keratin 1, 2A, 3,4, 5, 6A, 7, and 8 (KRT1 – KRT8). Only the first rod domain is shown above. Alignment was created
Protein sequence alignment of human keratin 1, 2A, 3,4, 5, 6A, 7, and 8 (KRT1 – KRT8). Only the first rod domain is shown above. Alignment was created using Clustal Omega.