title: Further evidence that the chromatid gap is a folding defect.
mesh_terms: D002110:Caffeine / Q000494:pharmacology; D002842:Chromatids / Q000187:drug effects / Q000648:ultrastructure*; D006801:Humans; D008214:Lymphocytes / Q000648:ultrastructure; D008623:Mercaptoethanol / Q000494:pharmacology
chemical_list: D002110:Caffeine; D008623:Mercaptoethanol