title: Antigen presentation: comments on its regulation and mechanism.
mesh_terms: D000375:Aging; D000818:Animals; D000831:Animals, Newborn; D001667:Binding, Competitive; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D008213:Lymphocyte Activation; D008211:Lymphocyte Cooperation; D008221:Lymphoid Tissue / Q000166:cytology / Q000276:immunology; D008222:Lymphokines / Q000096:biosynthesis; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology* / Q000378:metabolism / Q000502:physiology; D051379:Mice; D011948:Receptors, Antigen, T-Cell / Q000378:metabolism; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology* / Q000378:metabolism
chemical_list: D000949:Histocompatibility Antigens Class II; D008222:Lymphokines; D011948:Receptors, Antigen, T-Cell