title: Activity of both mouse and Chinese hamster ribosomal RNA genes in somatic cell hybrids.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000502:physiology; D002478:Cells, Cultured; D002875:Chromosomes / Q000502:physiology; D006224:Cricetinae; D006822:Hybrid Cells / Q000502:physiology*; D051379:Mice; D012335:RNA, Ribosomal / Q000235:genetics*; D013045:Species Specificity
chemical_list: D012335:RNA, Ribosomal