title: Antigenic characterization of the internal proteins of Newcastle disease virus by monoclonal antibodies.
abstract: We have prepared and characterized monoclonal antibodies against the three internal structural proteins, M, P and NP, of Newcastle disease virus. At least two non-overlapping antigenic sites were delineated on the M protein, four on the P, and two on the NP by competitive binding assay. One of the two non-overlapping antigenic sites on the M protein was found to be a cluster of at least three distinct epitopes. Enhancement of antibody binding by the binding of a second antibody was observed with the M protein. The reactivity of these monoclonal antibodies with heterologous strains was studied by enzyme-linked immunosorbent assay. The results indicated that there are both highly conserved antigenic sites and those subject to remarkable change on both M and P proteins. On the other hand, NP appeared to be antigenically more stable.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000918:Antibody Specificity; D000956:Antigens, Viral / Q000276:immunology*; D001667:Binding, Competitive; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes; D009522:Newcastle disease virus / Q000276:immunology*; D019590:Nucleocapsid Proteins; D009698:Nucleoproteins; D014758:Viral Core Proteins / Q000276:immunology*; D014763:Viral Matrix Proteins; D014764:Viral Proteins / Q000276:immunology*; D015678:Viral Structural Proteins
chemical_list: D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; D000939:Epitopes; D019590:Nucleocapsid Proteins; D009698:Nucleoproteins; D014758:Viral Core Proteins; D014763:Viral Matrix Proteins; D014764:Viral Proteins; D015678:Viral Structural Proteins