On the other hand, the serum MASP-2 levels in the AIH group were significantly lower than those in the HC group depending on the severity of AIH (HC, 1,204 ng/ml; mild AIH, 837 ng/ml; moderate AIH, 583 ng/ml; severe AIH, 422 ng/ml) (Fig. 1B). The gene discussed is MASP2; the disease is autoimmune hepatitis.