Goat anti-human IgA (alpha chain), FITC (fluorescein-5-isothiocyanate) conjugated, F(ab) '2 fragment of a secondary antibody which binds to human IgA in immunological assays. FITC has Amax = 494 nm, Emax = 518 nm. Fluor to protein ratio is 3-7 moles FITC per mole antibody. Antibody solution may contain small amounts of intact IgG. F(ab)'2 fragment