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Biology How does the primary sequence of a protein dictate its structure and function? * Explain all the different types of structures. * Use a range of proteins stating their functions linking back to their primary structure. * Use diagrams. First discovered in 1838, proteins are complex organic compounds containing the elements carbon, hydrogen, oxygen, nitrogen and sometimes sulphur. Other proteins can also form complexes with other molecules containing phosphorus, iron, zinc and copper. These are known as prosthetic groups. Proteins are macromolecules of high relative molecular mass (between several thousand and million) consisting of chains of amino acids. There are twenty different types of amino acids, as shown below with their chemical structure. These can be classified into three groups. These are polar, non polar and charged. Polar and charged amino acids will often be found on the surface of the protein interacting with the surrounding water (hydrophilic). Non polar (hydrophobic) amino acids will...

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