Biological Advantages of Optical Purity

We may here consider briefly what advantages are obtained by living organisms through working with optically pure rather than racemic substances. Advantages there must be, if we are to explain on the basis of natural selection the evolution of such highly efiicient and specialized evasive and corrective mechanisms as those just discussed. 

Mills (102) has outlined persuasive though avowedly tentative arguments, based on a cautious application of the law of mass action to enzymic 

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