Phytohaemagglutinin M (PHA-M) liquid - 5ml Reference: L3010-005 Phytohaemagglutinin is a lectin extracted from red kidney beans (Phaseolus vulgaris). PHA-M is the mucoprotein form and is a crude extract used for the stimulation of cell proliferation in lymphocyte culture. PHA-M also has a powerful erythroagglutinating property and it was originally used for separating leukocytes from whole blood.