Pisum Sativum Agglutinin (PSA), Unconjugated, 10 mg. PSA is nearly identical in structure and carbohydrate specificity to Lens culinaris agglutinin. The lectin has specificity toward alpha-linked mannose-containing oligosaccharides, with an N-acetylchitobiose-linked alpha-fucose residue included in the receptor sequence. Calcium and manganese ions are required for activity. PSA has been used to fractionate cells, to isolate glycoproteins and glycopeptides, to distinguish between normal and virally transformed cells, as a T-cell mitogen, and as an inhibitor of allograft rejection. Inhibiting/Eluting Sugar: mixture of 200 mM alpha-methylmannoside/200 mM alpha-methylglucoside.