alpha helix

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alpha helix

[′al·fə ′hē·liks]
(cell and molecular biology)
A spatial configuration of the polypeptide chains of proteins in which the chain assumes a helical form, 0.54 nanometer in pitch, 3.6 amino acids per turn, presenting the appearance of a hollow cylinder with radiating side groups.
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References in periodicals archive ?
So far, there's no evidence that the proteins that guide shell growth in mollusks have an alpha helical structure like the fish antifreeze proteins.
By harnessing one of the most common, but elusive, structures in nature - the alpha helical peptide, we believe we can dramatically improve the treatment of these diseases and positively impact the lives of millions of patients around the globe.