An X-linked genetic disease affects a cation-transporting P-type ATPase, resulting in accumulation of copper in the intestinal epithelium because of failure to transport it normally into the blood. Infants with this disease have only 10% of normal blood copper levels. Decreased activity of which of the following enzymes is most likely to be identified in these infants?

1. A)γ-Glutamyl carboxylase
2. B)Prolyl hydroxylase
3. C)Cytochrome aa3
4. D)Tyrosinase
5. E)Lysyl oxidaseGABARITO