AL motif

Summarizing the modeling for the Schellman motif, all three of the questions posed can be answered affirmatively. A notable and automatic consequence of the motif is to position the C glycine in a left handed turn conformation. For the motif, glycine is the only sterically allowed residue at the C position. This conclusion from modeling is confirmed experimentally. In every instance of an aL motif... 

Is there a common, underlying theme for organic chemistry that allows one to understand it rather than simply memorize In this book, acids and bases provide the theme. It is important to understand the relationships among functional groups. How are they similar and what structm al motifs make them react differently What is the relationship between structure and chemical reactivity These questions point to rmderstanding not only the chemical reactions that poprdate an organic chemistry book, but also the mechanisms used to describe those reactions. 

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