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  • Title: Correction of excision repair in xeroderma pigmentosum by hamster chromosome fragments involves both classes of pyrimidine dimers.
    Author: Karentz D, Mitchell D, Cleaver JE.
    Journal: Somat Cell Mol Genet; 1987 Nov; 13(6):621-5. PubMed ID: 3478816.
    Abstract:
    The ultraviolet light-sensitive phenotype of xeroderma pigmentosum (XP) has been corrected by the incorporation into XP cells of small chromosome fragments from Chinese hamster ovary cells. Like normal human and hamster cells, these XP-hamster hybrids are able to excise both of the photoproducts produced by ultraviolet light: cyclobutane pyrimidine dimers and the minor photoproduct, (6-4) pyrimidine-pyrimidone dimers. This excision capacity contrasts with that of an XP revertant, of the same cell line used in this study, which is able to excise only the (6-4) photoproducts. The excision defect of XP has been fully corrected in the hybrids; therefore, the small hamster chromosome fragments they contain should carry the gene for complementation group A of XP.
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