Differential staining of chromatids reveals substitution of BUdr for thymine in "old" DNA strands.
D001973:Bromodeoxyuridine / Q000032:analysis / Q000378:metabolism*; D002453:Cell Cycle; D002455:Cell Division; D002460:Cell Line; D002842:Chromatids / Q000032:analysis*; D004247:DNA / Q000032:analysis / Q000096:biosynthesis*; D013194:Staining and Labeling; D013941:Thymine / Q000032:analysis / Q000378:metabolism*
D004247:DNA; D001973:Bromodeoxyuridine; D013941:Thymine