primary structure

of a segment of a polypeptide
https://doi.org/10.1351/goldbook.P04844
The amino acid sequence of the polypeptide chain(s), without regard to spatial arrangement (apart from configuration at the α-carbon atom).
Note:
This definition does not include the positions of disulfide bonds and is therefore not identical with 'covalent structure'.
Source:
White Book, 2nd ed., p. 80 (https://www.qmul.ac.uk/sbcs/iupac/bibliog/white.html)