title: Conservation of sequences in related genomes of Apodemus: constraints on the maintenance of satellite DNA sequences.
abstract: Satellites from two related species of the Apodemus genus, A. sylvaticus and A. flavicollis, have been analysed with restriction enzymes Taq I, Alu I and Hind III. The restriction maps are closely conserved between species and show a novel feature of two differing internal periodicities within a 375 base pair repeating unit detected by two different restriction enzymes. This places constraints on the introduction of the observed restriction sites according to current models such as unequal crossing-over. The implications of such a conserved sequence and its presence in other species are discussed.
mesh_terms: D000818:Animals; D001483:Base Sequence; D004247:DNA; D004262:DNA Restriction Enzymes; D004276:DNA, Satellite; D005796:Genes; D008099:Liver / Q000032:analysis; D051379:Mice; D013045:Species Specificity
chemical_list: D004276:DNA, Satellite; D004247:DNA; D004262:DNA Restriction Enzymes