Primary= sequence of AA, polypeptide chain held by peptide bonds.
Secondary= the primary structure (polypeptide chain) coils to form a helix, held by hydrogen bonds.
Tertiary=secondary structure folds again to form final 3D shap, held together by hydrogen/ionic/disulfide bonds.
Quarternary=made of more then one polypeptide chain.
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A-level Biology Notes
General FictionTopics 1-4 of A-level Biology AQA New specification