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Is phenylalanine an acid or a base?

April 26, 2017acid base phenylalanine

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Is phenylalanine an acid or a base?

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Thus, the acidity or bascicity of a pure amino acid in solution is determined by the side chain. Since the side chain of phenylalanine is a phenyl group (essentially benzene) which is also netural, a solution of phenylalanine would be neutral as well, with a pH of around 7.