Description_x000D_ Packaging_x000D_ 1, 2 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ PA-I has a major affinity for D-galactose and its derivatives. PA-I agglutinates all types of human and animal erythrocytes and interacts also with unicellular protozoa, algae and bacteria. PA-I induces mitogenic stimulation in cultured human lymphocytes pretreated with neuraminidase._x000D_ Packaging_x000D_ Package size based on protein content. Vial content based on protein by biuret._x000D_ Quality_x000D_ Highly purified._x000D_ Physical form_x000D_ Lyophilized powder containing approx. 80% protein (biuret), balance primarily sodium citrate, plus traces of calcium chloride, magnesium chloride and manganese chloride_x000D_ Preparation Note_x000D_ Purified by affinity chromatography using a modification of Gilboa-Garber.1_x000D_ Analysis Note_x000D_ Agglutination activity is expressed in μg/ml and is determined from serial dilutions of a 1 mg/ml solution using phosphate buffered saline, pH 7.0. This activity is the lowest concentration to agglutinate a 2% suspension of neuraminidase treated human blood group A erythrocytes after one hr incubation at 25 °C.