alpha_helix
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.
SO:0001116
right_handed_peptide_helix
is_a
a-helix
related
helix
related