This antibody reacts with the heavy chains on sheep IgG and with the light chains on all sheep immunoglobulins based on immunoelectrophoresis.Minimum cross-reactivity is observed to non-immunoglobulin sheep serum proteins and human,mouse,rabbit IgG based on immunoelectrophoresis.Antibody is supplied in 10 mM sodium phosphate, 150 mM sodium chloride, pH 7, ,1% (w/v) BSA, Protease/IgG free, 0.05 % (w/v) sodium azide as preservative.BSA and milk have to be replaced by other blocking reagents, like doneky serum or commercial formulations which are free from bovine IgG.