Goat anti-human IgG Fc, , FITC-fluorescein-5-isothiocyanate conjugated is a F(ab)2 fragment of a secondary antibody which binds to human IgG in immunological assay. FITC has Amax = 494 nm, Emax = 518 nm. Fluor to protein ratio is 3-7 moles FITC per mole