Anti-IGG1 antibodies are useful reagents for the immunodetection of the target protein, IGG1.The target antigen refers to immunoglobulin G sublcass 1, which is one of four IgG subtypes. IgG1 is glycosylated and is 146 kilodaltons in mass. It is generally the most abundant and predominant subclass to be produced in response to protein antigens.