CTCF is conserved from Drosophila to humans and confers enhancer blocking of the Fab-8 insulator. - Moon H; Filippova G; Loukinov D; Pugacheva E; Chen Q; Smith ST; Munhall A; Grewe B; Bartkuhn M; Arnold R; Burke LJ; Renkawitz-Pohl R; et al. (EMBO reports, 2005)