The defined organization of two or more macromolecules with tertiary structure such as a protein that are held together by hydrogen bonds and van der Waals and coulombic forces.
See also: primary structure, secondary structure, tertiary structure
Source:
PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2216 (https://doi.org/10.1351/pac199668122193)
See also:
White Book, 2nd ed., p. 80 (https://iupac.qmul.ac.uk/bibliog/white.html)