CD79A and idiopathic membranous glomerulonephritis: IgAN is caused by aberrant glycosylation of IgA, formation of autoantibodies against IgA, and ultimately, deposition of immunocomplexes inside glomeruli [20], while in MGN, the formation of immunocomplexes in glomerular basement membrane is caused by autoantibodies directed against in situ antigens [21].