The IgG4 subclass.
D000888:Antibodies, Anti-Idiotypic / Q000276:immunology; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology*; D007074:Immunoglobulin G / Q000276:immunology*; D007075:Immunoglobulin M / Q000276:immunology
D000888:Antibodies, Anti-Idiotypic; D007074:Immunoglobulin G; D007075:Immunoglobulin M