title: Studies on epsilon-prototoxin of Clostridium perfringens type D. I. Purification methods: evidence for multiple forms of epsilon-prototoxin.
mesh_terms: D000818:Animals; D002852:Chromatography, Ion Exchange; D003016:Clostridium perfringens; D003470:Culture Media; D004589:Electrophoresis, Disc; D007106:Immune Sera; D005779:Immunodiffusion; D008722:Methods; D011817:Rabbits; D014118:Toxins, Biological / Q000302:isolation & purification*; D014357:Trypsin
chemical_list: D003470:Culture Media; D007106:Immune Sera; D014118:Toxins, Biological; D014357:Trypsin