Mutations in transcriptional regulator ATRX establish the functional significance of a PHD-like domain. by Gibbons, R, Bachoo, S, Picketts, D, Aftimos, S, Asenbauer, B, Bergoffen, J, Berry, SA, Dahl, N, Fryer, A, Keppler, K, Kurosawa, K, Levin, M, Masuno, M, Neri, G, Pierpont, M, Slaney, S, Higgs, D