on the basis of the antigenic substructure of tetanus neurotoxin , the antitoxin compositions of horse , rabbit and human tetanus antitoxin sera , in terms of their contents of antibodies against four antigenic determinant groups ( alpha , beta-1 , beta-2 and the `` '' topographic '' '' determinant group gamma ) so far known for the toxin were studied by quantitative precipitation reactions using purified toxin , complementary fragments alpha , beta and fragment beta-1 ( a subfragment of fragment beta ) of the toxin .
C0003320
antigenic
C0003316
antigenic determinant