Amino acids serve as ideal molecules to introduce stereochemical terms: The classical epitome of a chiral (handed) molecule is the amino acid a-alanine. a-Alanine possesses of the sum formula C3H7NO2 and can be depicted by two distinct molecular structures, given in Fig. 2.1. These two structures illustrate the identical
U. Meierhenrich, Amino Acids and the Asymmetry of Life. Advances in Astrobiology and Biogeophysics, ©c Springer-Verlag Berlin Heidelberg 2008
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