The conformational arrangement (α-@H02769@, β-pleated sheet, etc.) of the @B00574@ segments of a macromolecule such as a polypeptide chain of a protein without regard to the @C01258@ of the side chains or the relationship to other segments.
See also:
primary structure
tertiary structure
quaternary structure
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2218 [Terms] [Paper]