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  • Posted: 01/28/2005
  • Reviewed: 09/01/2006

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Slide 15


Amino Acids

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Humans use 20 different amino acids as building blocks to make the thousands of proteins found within the body. Each amino acid has the same basic structure with a central carbon atom that has four groups attached. Three of the groups are the same in every amino acid: one is a single hydrogen, one is an amino group that acts like a hook, and one is a carboxyl group that acts like an eye. The fourth group is a side chain, which is unique for every amino acid.

Amino Acids