The Xmrk oncogene can escape nonfunctionalization in a highly unstable subtelomeric region of the genome of the fish Xiphophorus
J. N Volff, C. Korting, A. Froschauer, Q. Zhou, B. Wilde, C. Schultheis, Y. Selz, K. Sweeney, J. Duschl, K. Wichert, J. Altschmied, and M. Schartl
(2003)