23. Quaternary structure
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What does quaternary structure arise from?
Arises by 2 or more tertiary polypeptide chains held by bonds
2
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What does the quaternary structure often include?
Extra functional groups e.g. haem molecules in haemoglobin
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What is the quaternary structure associated with?
Non protein groups -> Form complex molecules like haemoglobin
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What does haemoglobin have?
4 polypeptide chains
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What codes for haemoglobin?
4 genes needed -> 1 code for each polypeptide
Note 
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