| 摘要 |
An antigen inducing protective immunity against homologous or heterologous challenge with Babesia of cattle having the following properties:- (i) one sub-unit having a molecular weight of 38,000; (ii) an N terminus end of the 38,000 molecular weight sub-unit including the sequence Methionine-Tyrosine-Aspartate-Glutamine-Asparagine-Glycine-Lysine; and (iii) another polypeptide having a molecular weight of 22,000 which is bound or associated with the sub-unit of molecular weight 38,000. The invention also includes an antigen obtained from the abovementioned native antigen by recombinant methods having a defined amino acid sequence and an antigen derived from a gene having a defined DNA sequence. THe invention also includes within its scope monoclonal antibodies immunoreactive with these antigens as well as vaccines for treatment of babesiosis also including the above antigens. |
