A -helix protein structure, Biology

a -HELIX

In this intra molecular hydrogen bonds are present
The polypeptide chain is spirally coiled, generally in a clock-wise or right handed fashion.
Glycine and proline are unable to form hydrogen bonds.
They are called helix breakers. a -helix is the final structure in certain fibrous proteins, e.g., keratin (hair, nail, horn), epidermis (skin).
Keratin is known as sclero protein.
Keratin cannot be digested.
Keratin present in the hair.

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