title: The diphtheria bacillus and its toxin: a model system.
mesh_terms: D000818:Animals; D003353:Corynebacterium diphtheriae / Q000302:isolation & purification / Q000472:pathogenicity; D003460:Crystallization; D004167:Diphtheria Toxin / Q000302:isolation & purification / Q000633:toxicity; D006168:Guinea Pigs; D006801:Humans; D009305:Nasopharynx / Q000382:microbiology; D014118:Toxins, Biological / Q000633:toxicity; D014961:X-Ray Diffraction
chemical_list: D004167:Diphtheria Toxin; D014118:Toxins, Biological