title: Characterization of an early activation-dependent antigen on lymphocytes defined by the monoclonal antibody BL-Ac(F2).
abstract: A novel activation-dependent lymphocyte cell-surface antigen which is recognized by a MoAb, BL-Ac(F2), is described. Although not found on resting lymphocytes the antigen is induced rapidly within 2-4 h following stimulation of the cells using mitogens or antibodies against the T-cell CD3 antigen and sIgM on B cells, respectively. Immunoprecipitation and Western Blotting indicated that the MoAb recognizes a molecule in a range of 78-85 kDa. Beyond its activation-dependent expression on lymphocytes the antigen was detected also on myelo-monocytic cells. Expression kinetics and cellular distribution of this molecule suggest that it is distinct from previously described activation-dependent cell-surface antigens such as CD69, CD25 and 4F2.
authors.affiliation: University of Leipzig, Department of Biosciences, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Eichler
authors.forename: G
authors.initials: G
authors.lastname: Aust
authors.forename: D
authors.initials: D
authors.lastname: Hamann
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D015703:Antigens, CD / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology; D000954:Antigens, Surface / Q000276:immunology; D015153:Blotting, Western; D002460:Cell Line; D006801:Humans; D037181:Lectins, C-Type; D008213:Lymphocyte Activation / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology*; D051379:Mice; D008934:Mitogens; D011233:Precipitin Tests; D015375:Receptors, Interleukin-2 / Q000276:immunology; D014407:Tumor Cells, Cultured; D000099192:CD69 Antigens
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D037181:Lectins, C-Type; D008934:Mitogens; D015375:Receptors, Interleukin-2; D000099192:CD69 Antigens