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Levels of Protein Structure

Levels of Protein Structure - Thr Gly Thr Gly Glu Seu Holly...

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Holly Lowe 9-22-08 Period 5 Thr Gly Thr Gly Glu Seu Lys Pro Leu Met Val Asp Leu Gly Arg Val Ala Levels of Protein Structure There are four levels of structure that are important to proteins. The first level is the primary (1 ° ), the second is secondary (2 ° ), the third is tertiary (3 ° ) and the fourth is quaternary (4 ° ). The primary level of structure is responsible for the sequence of amino acids in the polypeptide chain. The order of the amino acids is very important and is not determined by random linkages but by specific genetic material that each amino acid contains. The primary structure is like a really long word and if the letters get mixed up it is no longer the same word, therefore the structure may not get mixed up either because that would change the protein. The types of bonds in the primary level of structure are peptide bonds. The secondary Level of structure consists of the coils and folds that are made of polypeptide chains. There is the β pleated sheet and the α Helix which is coil shaped. The weak
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