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Levels of protein structure.
Member rating: No Rating | Words: | Submitted: Fri Nov 21 2003
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Levels of Protein Structure Proteins are a group of organic compounds whose molecules consist of carbon, oxygen, nitrogen and sometimes sulphur atoms. They are condensation polymers of amino acids. Each amino acid carries two functional groups ( an amino group - NH and a carboxyl group - COOH.) These two functional groups are attached to a alpha-carbon along with hydrogen and the 'R' group. The 'R' group differs from amino acid to amino acid. Amino acids can be joined together by condensation. A hydrogen atom is removed from the amino group of one amino acid and this combines with an - OH group removed from the carboxylic acid of the other, forming a molecule of water. This is called a dipeptide bond. Longer chains are called polypeptides. The shape and the properties of the polypeptides are determined by the order of the 'R' group. The varying of the 'R' group and...
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