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Chirality in living systems

Almost 140 years ago Pasteur showed how a racemic mixture could be separated into its chiral constituents. Ever since, theories such as the three possibilities above have been proposed to explain an abiotic origin for molecular chirality in living systems. At the present time, however, no agreement exists about which explanation is best. In each ofthese scenarios, we can imagine production of some initial enantiomeric excess (e.e.). [Pg.176]

In the previous three chapters we have tried to provide a careful definition of what we mean by chirality, briefly discussed the scientific breakthroughs that form the basis of our current understanding of chirality in living systems, and outlined the various possible origins of chirahty on earth. In the rest of this book we will try to connect our knowledge of molecular handedness to our human experiences in a chiral world. As we will soon see, there are in fact very few things in our lives that are not affected by chirality. In the remaining chapters we will present some examples to illustrate this point. [Pg.81]


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