title: Double minutes in human tumor cells.
mesh_terms: D002453:Cell Cycle; D002460:Cell Line; D002503:Centromere / Q000648:ultrastructure; D002877:Chromosomes, Human / Q000648:ultrastructure*; D004351:Drug Resistance; D005260:Female; D005784:Gene Amplification; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D009369:Neoplasms / Q000235:genetics / Q000648:ultrastructure*; D010641:Phenotype; D013194:Staining and Labeling