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.
Analogy
Think of an alpha helix like a coiled spring or telephone cord. Just as these objects have a spiraling structure, so does an alpha helix in proteins.
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.
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