title: The problem of genetic identity of different cell types.
mesh_terms: D000818:Animals; D001200:Ascaris; D001483:Base Sequence; D002247:Carbon Isotopes; D002454:Cell Differentiation; D004247:DNA / Q000032:analysis; D007909:Lenses; D051379:Mice; D008967:Molecular Biology; D009693:Nucleic Acid Hybridization; D012335:RNA, Ribosomal / Q000032:analysis; D012038:Regeneration; D013045:Species Specificity; D014981:Xenopus
chemical_list: D002247:Carbon Isotopes; D012335:RNA, Ribosomal; D004247:DNA