title: The common ancestry of genes and spacers in the euchromatic region: omnis ordinis hereditarium a ordinis priscum minutum.
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D002843:Chromatin; D004247:DNA / Q000235:genetics; D005784:Gene Amplification; D005796:Genes; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics; D008322:Mammals / Q000235:genetics*; D051379:Mice; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D002843:Chromatin; D007136:Immunoglobulins; D004247:DNA