Description_x000D_ Packaging_x000D_ 5 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ PSA is not blood group specific, but has an affinity for terminal α-D-mannosyl residues. PSA is a mitogen similar to concanavalin A._x000D_ Preparation Note_x000D_ Conjugates are prepared from affinity purified lectin._x000D_ Purified by affinity chromatography._x000D_ Analysis Note_x000D_ Agglutination activity is expressed in μg/ml and is determined from serial dilutions in phosphate buffered saline, pH 6.8, of a 1 mg/ml solution. This activity is the lowest concentration to agglutinate a 2% suspension of human erythrocytes after 1 hr incubation at 25 °C.