title: On the arrangement of genes for 28 s and 18 s ribosomal RNA's in Drosophila melanogaster.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002874:Chromosome Mapping; D002875:Chromosomes / Q000032:analysis; D004247:DNA / Q000302:isolation & purification; D004331:Drosophila melanogaster; D005796:Genes; D005815:Genetic Code; D006238:Haploidy; D008722:Methods; D009154:Mutation; D009693:Nucleic Acid Hybridization; D012335:RNA, Ribosomal / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D012335:RNA, Ribosomal; D004247:DNA