title: Studies on mycobacterial sensitizing fractions. 3. PPD and PPD-S protein preparations isolated from four BCG substrains.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis / Q000302:isolation & purification*; D055598:Chemical Phenomena; D011232:Chemical Precipitation; D002621:Chemistry; D004586:Electrophoresis; D009163:Mycobacterium bovis / Q000254:growth & development / Q000276:immunology*; D009696:Nucleic Acids / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000032:analysis; D000644:Quaternary Ammonium Compounds; D014238:Trichloroacetic Acid; D014373:Tuberculin
chemical_list: D001426:Bacterial Proteins; D009696:Nucleic Acids; D011135:Polysaccharides, Bacterial; D000644:Quaternary Ammonium Compounds; D014373:Tuberculin; D014238:Trichloroacetic Acid