NMR-Based Strategies to Elucidate Bioactive Conformations of Weakly Binding Ligands -- Quantitative Analysis of STD-NMR Spectra of Reversibly Forming Ligand–Receptor Complexes -- Structural and Functional Studies of Peptide–Carbohydrate Mimicry -- Studies on the Conformational Features of Neomycin-B and its Molecular Recognition by RNA and Bacterial Defense Proteins -- Solid State NMR Structure Analysis of the Antimicrobial Peptide Gramicidin S in Lipid Membranes: Concentration-Dependent Re-alignment and Self-Assembly as a ?-Barrel -- Modulation of the Bioactive Conformation of Transforming Growth Factor ?: Possible Implications of Cation Binding for Biological Function -- Molecular Recognition of Ligands by Native Viruses and Virus-Like Particles as Studied by NMR Experiments -- Investigation of Proteins in Living Bacteria with In-Cell NMR Experiments.