Rabbit IgG Fraction to Sheep Red Blood Cells, 2mL

Product is the lyophilized powder of rabbit IgG fraction to sheep red blood cells and buffer salts. Applications Immunoblotting; Immunostaining of acetone-fixed frozen and formalin-fixed, paraffin-embedded tissue sections. This product is suitable for sensitizing cells in hemolytic complement assays, and for lymphocyte screening procedures, especially screening for T cells and T receptor-bearing lymphocytes. This product is suitable for conjugation with enzymes, radiolabels, fluorochromes or other markers. Preparation Method The antiserum is prepared by immunizing healthy rabbits with red blood cells obtained from healthy sheep. The IgG fraction is prepared from the specific rabbit antiserum by delipidation, ammonium sulfate fractionation and anion exchange chromatography. The resulting IgG fraction is dialyzed into 0.02M sodium phosphate, 0.14M sodium chloride, pH 7.3, 0.05% sodium azide, adjusted to standard titer, filtered through a 0.22 µm filter, vialed and lyophilized. Analysis Note The total protein is measured using the Biuret procedure, with bovine albumin as a standard. Hemagglutination titer is standardized with an in-house control by measurement of agglutination end-point with 10% sheep red blood cells. Each IgG fraction is tested for purity at a minimum of 40 mg/mL using immunoelectrophoresis. The product is mostly rabbit IgG; no trace of albumin is detected.