title: Self recognition in the immune system.
mesh_terms: D006801:Humans; D007108:Immune Tolerance; D007128:Immunoglobulin Fragments / Q000276:immunology*; D008264:Macrophages / Q000276:immunology; D014405:Tuftsin / Q000276:immunology*
chemical_list: D007128:Immunoglobulin Fragments; D014405:Tuftsin