title: Presence of two active X chromosomes in hybrids between normal human and SV40-transformed fibroblasts from patients with the Lesch-Nyhan syndrome.
mesh_terms: D002459:Cell Fusion; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D006801:Humans; D006822:Hybrid Cells; D007621:Karyotyping; D007926:Lesch-Nyhan Syndrome; D008168:Lung; D012730:Sex Chromosomes; D013539:Simian virus 40