electrophoresis on a starch-supporting medium was used to fractionate sera containing human diphtheria antitoxin of the following varieties ( a ) precipitating antitoxin , ( b ) non-precipitating skin-sensitizing antitoxin , and ( c ) mixtures containing precipitating and skin-sensitizing antitoxins .
C0012547
diphtheria antitoxin
C0003445
antitoxins