quaternary structure
What quaternary structure means in Biology A-Level, as defined for AQA.
Definitions of quaternary structure
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Reference: AQA
More than one polypeptide chain, held together by interactions between the chains such as hydrogen bonds, ionic bonds and hydrophobic interactions.
More than one polypeptide chain in the functional protein, held together by interactions between polypeptides.
Two or more polypeptides, and sometimes prosthetic groups, assembled together, which also affects function.
Topics that use quaternary structure
- General properties of proteins (AQA A-Level)
- Mass transport in animals (AQA A-Level)
Related terms
- active sites and binding sites
- affinity
- affinity for oxygen
- amino acids
- atrial systole
- Atrioventricular valves
- biconcave disc
- Biological drawing conventions
Using quaternary structure in the exam
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