To facilitate the use of oligosaccharides as analytical tools in biological studies, we have designed, synthesized, and conjugated to maltosaccharides a novel series of homologous small fluorescent moieties that differ in formal charge. These moieties are amide derivatives of anthranilic acid: uncharged N-(2-aminobenzoyl) glycinamide (ABGlyAmide; 2), acidic N, N- dimethyl-N′-(2-aminobenzoyl) ethylenediamine (ABGlyDIMED; 3), and basic N-(2- ...