ten sera collected during the winter months from six sheep infected with johne 's bacilli were fractionated on sephadex g-25 columns , and all fractions tested for complement-fixing antibody , anticomplementary properties and for supplementing and inhibitory activities when added to complement-fixation tests of a heterologous antigen-antibody system : bovine or ovine antiserum with brucella abortus antigen .
C0003333
heterologous antigen
C0003320
antigen