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Analysis of the amino acids in protein by paper chromatography
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| Submitted: Thu Jul 11 2002
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Pedro de Carvalho A2 Biology Coursework Analysis of the amino acids in protein by paper chromatography Introduction Amino acids are a group of over a hundred chemicals of which around twenty commonly occur in protein. They always contain a basic group, the amino group (-NH ) and an acid group, the carboxyl group (-COOOH ) as shown in fig. I1 R C H O N C H H OH Fig.I1 All the amino acids have the same basic chemical structure. It is only the R-group that differs. In the amino acid glycine, for example, it is H while in alamine it is CH. A condensation reaction occurs between the amino group of amino acid and the carboxyl of another to form a dipeptide. Further combinations of this type extend the length of the chain to form a polypeptide (protein). A polyptide usually contains many hundreds of amino acids. Proteins are required for making enzymes, many structural components and cell secretions....
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