title: Letter: Sequential G and C chromosome banding.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002900:Chromosomes, Human, 1-3; D002904:Chromosomes, Human, 21-22 and Y; D006224:Cricetinae; D006801:Humans; D006918:Hydroxyurea / Q000494:pharmacology; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008722:Methods; D012730:Sex Chromosomes; D013194:Staining and Labeling; D013936:Thymidine / Q000494:pharmacology
chemical_list: D013936:Thymidine; D006918:Hydroxyurea