Alpha Helix

Definition

An alpha helix is a type of secondary structure in proteins where the polypeptide chain forms a spiral shape, held together by hydrogen bonds.

Related terms

Polypeptide: A long chain of amino acids that makes up part of a protein's structure.

Hydrogen Bonding: A type of chemical bond where a hydrogen atom with a partial positive charge attracts the negative charge of another atom (often oxygen or nitrogen).

Secondary Structure:

The local folding pattern within a protein, including structures such as alpha helices and beta-pleated sheets.