title: Detection of antigenic variation of influenza A matrix protein by a competitive radioimmunoassay.
abstract: Antigenic relationships among the matrix proteins of influenza A viruses were analysed using a competitive radioimmunoassay technique. There were at least two antigenic determinants on the M protein of A/PR/8/34 virus. One antigenic determinant was shared by several influenza A viruses of human, avian, swine or equine origin, while the second determinant was not necessarily shared by all influenza viruses since it was not detected on the M protein of A/chicken/Germany/N/49 virus. In addition, the cross-reactive determinant(s) of the M protein of N virus was not equally represented in other influenza A virus subtypes.
mesh_terms: D003429:Cross Reactions; D000939:Epitopes; D009980:Influenza A virus / Q000276:immunology*; D011863:Radioimmunoassay; D014763:Viral Matrix Proteins; D014764:Viral Proteins / Q000276:immunology*
chemical_list: D000939:Epitopes; D014763:Viral Matrix Proteins; D014764:Viral Proteins