We examined how ZNT5–6 and ZNT7 are associated with the expression of TYRP1 in another human melanoma cell line, SK-MEL-2, which is deficient in both ZNT5 and ZNT7 (SK-Z5Z7-DKO), because of their usefulness in transient transfection studies33. The gene discussed is SLC30A5; the disease is melanoma.