These cell lines harbor the common CYP4V2 mutations found in East Asian (c.802–8_810del17insGC, c.992A > C and c.1091–2A > G) (9, 17, 18), European (c.1198C > T and c.332T > C) (9, 17, 19), and South Asian populations of patients with BCD (c.197T > G) (7, 9). The gene discussed is CYP4V2; the disease is Bietti crystalline corneoretinal dystrophy.