A 24-year-old nonsmoker who does not consume alcohol is found to have both pulmonary emphysema and cirrhosis of the liver. A sister and several close relatives also have had similar findings. This history suggests that this patient’s illness may be caused by deficiency of
A. α1-antitrypsin.
B. galactokinase.
C. glucose-6-phosphatase.
D. glucocerebrosidase.
E. phenylalanine hydroxylase.
Answer