title: Fine structure and evolution of DNA in heterochromatin.
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D002874:Chromosome Mapping; D004247:DNA / Q000235:genetics*; D004276:DNA, Satellite / Q000235:genetics*; D004330:Drosophila / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics; D006570:Heterochromatin / Q000502:physiology* / Q000648:ultrastructure; D008394:Marsupialia / Q000235:genetics*; D008938:Mitosis; D009693:Nucleic Acid Hybridization; D010944:Plants / Q000235:genetics*
chemical_list: D004276:DNA, Satellite; D006570:Heterochromatin; D004247:DNA