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Structural drawings of amino acids and sugars. (a) A generic α-amino acid, where the amino group is connected to the carbon immediately adjacent to the carboxylic acid. (b) Stereorepresentations of the two enantiomers of a chiral α-amino acid, denoted S and R. (c) Fischer projections denoting chirality of a chiral α-amino acid and sugar (chiral carbons marked with asterisks), where L denotes left and D denotes right; this naming convention only reflects the first chiral center.
