title: Species conservation of the T cell lymphocyte CD2 cell surface antigen.
abstract: A rabbit polyclonal antiserum was raised against a synthetic peptide, termed CD2-300, comprizing 18 amino acid resides which are conserved among the cytoplasmic domains of the human, rat and mouse CD2 antigens. Cross-depletion experiments showed that the CD2 monoclonal antibody OKT11 and purified CD2-300 antibodies (Ab) precipitated the same molecules from the surface of human T lymphoblasts. The results of immunoprecipitation analyses indicated that the purified CD2-300 Ab were specific for human and mouse CD2, and that the CD2-300 peptide competitively and specifically inhibited precipitation by CD2-300 Ab in both species. When employed to stain murine tissues, the CD2-300 Ab gave the anticipated pattern of distribution for the CD2 antigen, although there was some nonspecific labeling of non-T cells.
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000276:immunology*; D018801:CD2 Antigens; D011232:Chemical Precipitation; D003429:Cross Reactions; D006801:Humans; D007124:Immunoenzyme Techniques; D051379:Mice; D009842:Oligopeptides / Q000276:immunology; D014066:Palatine Tonsil / Q000276:immunology; D011971:Receptors, Immunologic / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000943:Antigens, Differentiation; D018801:CD2 Antigens; D009842:Oligopeptides; D011971:Receptors, Immunologic