The amino acids have these features in common:
The carboxyl group.
The amino group. (Proline is an imino acid.)
The a-carbon.
The b-carbon. (Glycine has no side-chain.)
The side chain (or R-group). Reset
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Select "D-amino acids" for viewing on the left to compare the different stereochemistries.

Return to image of L-Amino Acids.