title: Commercial PHA preparations contain different mitogenic components.
abstract: Three commercially available purified phytohaemagglutinin (PHA) preparations have been examined both chemically and biologically. Marked differences were observed in both composition and mitogenic effect on lymphocytes; the existence of at least two distinct mitogenic fractions in PHA was confirmed.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D004247:DNA / Q000096:biosynthesis; D004588:Electrophoresis, Cellulose Acetate; D008214:Lymphocytes / Q000166:cytology; D008938:Mitosis; D010835:Phytohemagglutinins / Q000032:analysis*
chemical_list: D000596:Amino Acids; D010835:Phytohemagglutinins; D004247:DNA