The amino acid sequence
of the polypeptide
chain(s), without regard to spatial arrangement (apart from configuration at the α-carbon atom).
This definition does not include the positions of disulfide bonds and is therefore not identical with 'covalent structure'.
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook