Type 1 AIH is defined by the presence of antinuclear antibodies (ANAs) and/or anti-smooth muscle antibodies (SMAs), while type 2 AIH is defined by the presence of anti-liver-kidney microsomal 1 (LKM-1) antibody and/or anti-liver cytosol type 1 (LC1) antibody (23, 24). The gene discussed is SGCG; the disease is autoimmune hepatitis.