Purity of this preparation is > 95% based on SDS-PAGE. Antibody concentration is > 4.5 mg/ml (E 1% at 280 nm = 13.0). Antibody is supplied in 10 mM sodium phosphate, 0.15 M sodium chloride, pH 7.2. Contains 0.05% (w/v) sodium azide as preservative of bacterial growth.Based on immunoelectrophoresis, this antibody reacts with: kappa (k) light chains on human immunoglobulins Based on immunoelectrophoresis, no reactivity is observed to:non-immunoglobulin human serum proteins heavy chains on human immunoglobulins, lambda light chains on human immunoglobulins, mouse serum proteins.