A Novel Solid-Phase Assembly for Identifying Potent and Selective RNA Ligands We thank Professors David Wilson and David Boykin for a generous gift of the aromatic amidine derivatives and Professor Kol for a generous gift of eilatin-containing complexes. We are grateful to Dr. Georg Schlechtingen and Professor Murray Goodman for assistance with peptide synthesis and to Ibis Therapeutics for partial support. N.W.L. is supported by a National Institute of Health Molecular Biophysics Training Grant (GM 08326).