IUPAC definition : The conformational arrangement (α-helix, β-pleated sheet, etc.) of the backbone segments
of a macromolecule such as a polypeptide chain of a protein without regard to the
conformation of the side chains or the relationship to other segments.;
The conformational arrangement (α-helix, β-pleated sheet, etc.) of the backbone segments
of a macromolecule such as a polypeptide chain of a protein without regard to the
conformation of the side chains or the relationship to other segments.