| Antigen | B2GP was purified from plasma that has been shown by certified tests to be negative for HBsAg and for antibodies to HIV and HCV. Purified protein (54 kda) is >98% pure by SDS-PAGE Biological activity ~4-5 PEU/mg solid. One PEU is defined as the amount of b2-glycoprotein 1 present in 1 ml of normal plasma (approximately 200 ug). Purified B2GP (cat # B2GP15-N-25) is supplied in 20 mM Hepes, 0.15M NaCl, 0.1mM PMSF, pH 7.5, and 20% glycerol and 0.1% bromonitrodioxane/methylisothiazoe (preservative) at 1 mg/ml or in powder form. Reconstitute powder in water at a 0.1-1 mg/ml. The protein is suitable for ELISA coating or as standards or as positive controls for Western. |