Protein Structures Primary, secondary, tertiary and quaternary structures of proteins. 2.0 / 5 based on 1 rating ? BiologyBiological molecules, organic chemistry and biochemistryASAll boards Created by: Laura EvansCreated on: 15-11-12 20:19 Primary Structure 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. 1 of 4 Secondary Structure 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 2 of 4 Tertiary Structure The irregular folding of a polypeptide chain into a globular (3 dimensional) shape. Held together by hydrogen bonds and disulfide bridges. 3 of 4 Quaternary Structure The association of several poylpeptide chains. e.g. Haemoglobin- two alpha helices and two beta pleated sheets. 4 of 4
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