- Mutations in a gene encoding an ABC transporter cause pseudoxanthoma elasticum. Le Saux, O., Urban, Z., Tschuch, C., Csiszar, K., Bacchelli, B., Quaglino, D., Pasquali-Ronchetti, I., Pope, F.M., Richards, A., Terry, S., Bercovitch, L., de Paepe, A., Boyd, C.D. Nat. Genet. (2000)