Donkey anti-sheep IgG (H&L), FITC (fluorescein-5-isothiocyanate) conjugated, is a secondary antibody which binds to all sheep IgGs in immunological assays. FITC has Amax = 494 nm, Emax = 518 nm. Fluor to protein ratio is 3-7 moles FITC per mole antibody. Antibody is adsorbed against human, mouse, rabbit IgG and affinity purified using solid phase sheep IgG.