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netLibrary - eBook Summary Structure-based Drug Design by ...

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Figure 1<br />

Examples of native peptide hormones, neurotransmitters, and releasing factors<br />

Page 561<br />

[9]. Finally, with respect to N-substituted amides it is also noteworthy to mention the intriguing<br />

approach [21] of replacing the traditional peptide scaffold <strong>by</strong> achiral N-substituted glycine building<br />

blocks. Overall, such Nα-Cα-C scaffold or Cα-Cβ side chain modifications provide significant<br />

opportunities for expanding peptide-<strong>based</strong> molecular diversity (i.e., so-called “peptoid” libraries) as well<br />

as to extend our 3D structural knowledge of traditional φ-Ψ-χ space.<br />

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