Abbreviation: AST: aspartate aminotransferase; ALT: alanine aminotransferase; ALP: alkaline phosphatase; AIH: autoimmune hepatitis; AMA: anti-mitochondrial antibody; AMA: anti-mitochondrial antibody; ANA: antinuclear antibody; ASMA: anti-smooth muscle cell antibody; IgG: immunoglobulin-G; LKM: liver-kidney-muscle; LSM: liver stiffness measurement; HCV: hepatitis C virus; RNA: ribonucleic acid. The gene discussed is GPT; the disease is autoimmune hepatitis.