Patent ID: 7553959

Claim:
A dye composition of the formula R—Fluorescent Dye wherein R comprises a reactive group covalently linked to said Fluorescent Dye wherein said Fluorescent Dye comprises a combination of two or more members selected from: a) unsaturated aliphatic groups comprising an alkene or alkyne; b) unsaturated heterocyclic groups; c) aromatic groups; and wherein R provides a conjugated system or an electron delocalized system with said Fluorescent Dye and said composition optionally comprises a charged or polar R′ group and wherein said composition further comprises a reactive group R x attached to either said fluorescent dye, said R group or said polar R′ group, wherein said reactive group R x comprises sulfhydryl, hydroxyl, amine, isothiocyanate, isocyanate, monochlorotriazine, dichlorotriazine, mono- or di-halogen substituted pyridine, mono- or di-halogen substituted diazine, maleimide, aziridine, sulfonylhalide, acid halide, hydroxysuccinimide ester, hydroxysulfosuccinimide ester, imidoester, hydrazine, azidonitrophenyl, azide, 3-(2-pyridyl dithio)-proprionamide, glyoxal or aldehyde.