title: Identification by monoclonal antibodies of a new epitope in the glycoprotein complex of Sindbis virus.
abstract: Monoclonal antibodies against a deletion mutant of Sindbis virus were produced and characterized in order to determine the fine mapping and functional activities of single viral epitopes. All monoclonal antibodies so far tested showed a certain degree of reciprocal competition and were directed against an antigenic determinant which was present only on the undissociated complex of the E1 and E2 glycoproteins. A biological assay measuring viral haemagglutination showed no decrease in the titre of viral samples preincubated with monoclonal antibodies. Conversely, a reduction in viral infectivity was demonstrated, particularly with two of these antibodies. The results suggest that the antibodies which we characterized seem to recognize a new epitope which is represented on both glycoproteins on the surface of this mutant of Sindbis virus.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral; D000956:Antigens, Viral / Q000276:immunology*; D001667:Binding, Competitive; D000939:Epitopes; D006023:Glycoproteins / Q000276:immunology*; D006825:Hybridomas / Q000276:immunology; D051379:Mice; D012845:Sindbis Virus / Q000276:immunology*; D014764:Viral Proteins / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral; D000956:Antigens, Viral; D000939:Epitopes; D006023:Glycoproteins; D014764:Viral Proteins