Description: IgG1 comprises 60-65% of the total main subclass IgG, and is predominantly responsible for the thymus mediated immune response against proteins and polypeptide antigens. IgG1 binds to the Fc-receptor of phagocytic cells and can activate the complement cascade via binding to C1 complex. A deficiency in IgG1 isotype typically is a sign of a Hypogammaglobulinemia.
