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Protein Structure (1 ° (The order / sequence of the amino acids of which…
Protein Structure
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3 °
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Caused by interactions between R groups (H-bonds, disulphide bridges, ionic bonds and hydrophobic interactions).
Tertiary structure may be important for the function of the protein e.g. specificity of active site in enzymes.
For some proteins, such as ribonuclease, the tertiary structure is the final structure of a functional protein. Other proteins are composed of two or more polypeptides and adopt a quaternary structure.
types of bonds:
ionic bond
can form between some of the strongly positive and negative amino acid side chains found buried deep within protein molecules
hydrogen bond
involved in all levels of structure. Although they are weak they can potentially form between any 2 amino acids positioned correctly so there are lots of them holding the protein together firmly.
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4 °
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A prosthetic group is an inorganic compound involved in a protein (e.g. the haem group in haemoglobin).
Those that do, have 2 or more polypeptide strands that aggregate together e.g. haemoglobin.
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