Such compounds are represented bythe formula:wherein R' is a fluorescer, L' is an amino acid or peptide or combinations of amino acids and thioacids or other carboxylic acids and T' is a functionality for linking to a nucleoside base or is a nucleoside, nucleotide or nucleotidetriphosphate.In a preferred embodiment of the present invention, the charge-imparting moiety is conveniently composed prim