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| Proteins are polymer structures made from different [[Amino_acids|amino acids]]. The number of [[Amino_acids|amino acids ]]within a sequence can vary from 20 [[amino acids|amino acids ]]to thousands of [[Amino_acids|amino acids ]]long.
| | See [[Protein|Protein]]<br> |
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| There are 4 different structures that proteins can have:
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| 1.[[Primary Protein Structure|Primary Structure ]]- linear amino acid sequence <br>2.[[Secondary Protein Structure|Secondary Structure ]]- gives rise to an alpha helix or beta pleated sheet held together by hydrogen bonds.[1]<br>3.[[Tertiary Protein Structure|Tertiary Structure ]]- gives rise to a single peptide 3D structure held together by various bonds such as hydrogen bonding, disulphide bonding, salt bridges and non-polar hydrophobic interactions.<br>4.[[Quaternary Protein Structure|Quaternary Structure]] - describes multiple peptide chains<br> that interact through various types of bonding to form a fully functional protein e.g. haemoglobin.
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| [1] Elliott.W.H, Elliott.D.C (1997) ''Biochemistry and Molecular Biology. ''New York, United States:Oxford University Press.pp.47-49.ISBN 0199271992
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Latest revision as of 07:56, 26 November 2010