Conjugate is present in 10 mM Sodium Phosphate, 0.15 M Sodium Chloride, pH 7.2, 1 % (w/v) BSA, Protease/IgG free. 0.05 % (w/v) sodium azide is added as preservative.Based on immunoelectrophoresis, this antibody reacts with: heavy (\x{03b3}) chains on sheep IgG light chains on all sheep immunoglobulinsNo reactivity is observed to: non-immunoglobulin sheep serum proteins.BSA and milk have to be replaced by other blocking reagents, like doneky serum or commercial formulations which are free from bovine IgG.