title: The immunological integrity of matrix substance A and its possible detection and quantitation in urine.
abstract: There would seem to be no doubt that most stone-forming patients at some time during the course of their disorder excrete substances not present in normal urine. However, considerable doubt must now exist that "Matrix Substance A" is a single antigenic entity or that its presence is confined to the active formation of renal calculi.
mesh_terms: D000941:Antigens / Q000652:urine*; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007669:Kidney Calculi / Q000276:immunology / Q000652:urine*; D007841:Latex Fixation Tests; D009088:Mucoproteins / Q000276:immunology* / Q000652:urine; D011863:Radioimmunoassay
chemical_list: D000941:Antigens; D007106:Immune Sera; D009088:Mucoproteins