The sequence of amino acids in a polypeptide chain.
The linear shape of a polypetide chain caused by peptide bonds, disulfide bridges and Hydrogen bonds.
The coiling of an amino acid chain into a spiral structure.
e.g. alpha helices, beta pleated sheets.
Held together by hydrogen bonds and disulfide bridges
The irregular folding of a polypeptide chain into a globular (3 dimensional) shape.
Held together by hydrogen bonds and disulfide bridges.
The association of several poylpeptide chains.
e.g. Haemoglobin- two alpha helices and two beta pleated sheets.