The functional groups designated as the r group in

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Unformatted text preview: st obtain from food. Furthermore, other amino acids (e.g. tyrosine) can only be synthesized in vivo from one of these essential amino acids. The chemical structure of all amino acids resembles that shown in Figure 1. The functional groups (designated as the “R” group in Figure 1) can be acidic or basic, hydrophilic or hydrophobic and ultimately affect both the protein’s structure and its interactions with its surroundings. Because every amino acid contains both a carboxylic acid and an amino group, the molecule can act as both an acid and a base. The covalent bonds (called peptide bonds) that connect amino acids in proteins are derived from a hydrolysis reaction between the carboxylic acid group of one amino acid and the amino group on the next amino acid (see Figure 2). Amino acids also occur as optical Figure 1: General structure of an amino isomers, the alpha acid. carbon is chiral in...
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This lab report was uploaded on 04/06/2014 for the course CHEM 272 taught by Professor Dr.brooks during the Summer '08 term at Maryland.

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