Sequence Types and Features Ontology (SO)
OWL
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Last submission date April 11, 2024
ID http://purl.obolibrary.org/obo/SO_0001117
http://purl.obolibrary.org/obo/SO_0001117
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Preferred name

alpha_helix

Synonyms

helix

Definitions

The helix has 3.6 residues per turn which corresponds to a translation of 1.5 angstroms (= 0.15 nm) along the helical axis. Every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier.

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