Pooled Normal Human AB Serum Off The Clot and Heat Inactivated from Innovative Research is collected as whole blood donations from male donors with blood type AB. The blood is allowed to spontaneously clot and the serum component is extracted. The units are then pooled, filtered, bottled, and cell culture tested for mycoplasma, endotoxin, and sterility. The serum then undergoes a heat inactivation process to destroy complement activity. This product is suitable forÂ