Proteins, Amino Acids, Condensation and Hydrolysis Reactions.

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Proteins

Proteins are substances whose molecules are made of many amino acids linked together in long chains. All amino acids have a central carbon atom, carbon atoms have four bonds which can hold them firmly to other atoms.

Basic Structure of an amino acid (http://image.tutorvista.com/content/biomolecules/a-amino-acid-structure.gif)

In an amino acid, the central carbon forms one bond with a carboxyl group, -COOH. There is another bond with a hydrogen atom, and a third bond with an amino group -NH2. The fourth bond, however, can be with any one of a whole range of different groups. The letter R is used to show this group. In animals there about twenty different amino acids, each with a different R group. The amino acids that make up a…

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