title: Time of duplication of ribosomal RNA cistrons in a cell line of Potorous tridactylis (rat kangaroo).
mesh_terms: D000818:Animals; D002460:Cell Line; D004247:DNA / Q000096:biosynthesis; D005823:Genetics; D008394:Marsupialia; D008938:Mitosis; D009693:Nucleic Acid Hybridization; D010759:Phosphorus Isotopes; D012335:RNA, Ribosomal; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D010759:Phosphorus Isotopes; D012335:RNA, Ribosomal; D014316:Tritium; D004247:DNA; D013936:Thymidine