Preface.List of Contributors.1. Versatile Oligo(N-Substituted) Glycines: The Many Roles of Peptoids in Drug Discovery (J. Patch, et al.). 2. s-Peptides, y-Peptides and Isosteric Backbones: New Scaffolds with Controlled Shapes for Mimicking Protein Secondary Structure Elements (G. Guichard).3. Regulation of Gene Expression with Pyrrole-Imidazole Polyamides (P. Dervan, et al.).4. Peptide Nucleic Acid (PNA): A Pseudo-peptide with DNA-like Properties (P. Nielsen, et al.). 5. a-Helical Peptide Nucleic Acids (aPNAs) (P. Garner, et al.). 6. DNA and RNA-cleaving Pseudo-peptides (A. Scarso & P. Scarso).Subject Index.