title: Modification of the antigenic surface of Rhizobium trifolii by a deficiency of calcium.
mesh_terms: D000372:Agglutination Tests; D000941:Antigens; D002118:Calcium; D004492:Edetic Acid; D006358:Hot Temperature; D007106:Immune Sera; D008623:Mercaptoethanol; D012231:Rhizobium / Q000276:immunology* / Q000378:metabolism
chemical_list: D000941:Antigens; D007106:Immune Sera; D008623:Mercaptoethanol; D004492:Edetic Acid; D002118:Calcium