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alpha helix
(redirected from Alpha-helixs)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
alpha helix
n.
The helical form, turned in a right-handed direction, of many proteins.
helix [he´liks] (pl. he´lices, helixes) (Gr.)
1. a winding structure; see also coil and spiral.
2. the superior and posterior free margin of the pinna of the ear.
α-helix (alpha helix) the complex structural arrangement of parts of protein molecules in which a single polypeptide chain forms a right-handed helix.
double helix (Watson-Crick helix) the structure of deoxyribonucleic acid (DNA), consisting of two coiled chains, each of which contains information completely specifying the other chain.
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