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    Nat Genet. 2003 Sep;35(1):25-31. Epub 2003 Aug 17.

    Cyclin-dependent kinase 2 is essential for meiosis but not for mitotic cell division in mice.

    Ortega S, Prieto I, Odajima J, Martín A, Dubus P, Sotillo R, Barbero JL, Malumbres M, Barbacid M.

    Source

    Molecular Oncology Program, Centro Nacional de Investigaciones Oncológicas, Melchor Fernández Almagro 3, Madrid E-28029, Spain. sortega@cnio.es

    Abstract

    We targeted the locus encoding the cyclin-dependent kinase 2 (CDK2) by homologous recombination in mouse embryonic stem (ES) cells. Embryonic fibroblasts lacking CDK2 proliferate normally and become immortal after continuous passage in culture. Elimination of a conditional Cdk2 allele in immortal cells does not have a significant effect on proliferation. Cdk2-/- mice are viable and survive for up to two years, indicating that CDK2 is also dispensable for proliferation and survival of most cell types. But CDK2 is essential for completion of prophase I during meiotic cell division in male and female germ cells, an unforeseen role for this cell cycle kinase.

    PMID:
    12923533
    [PubMed - indexed for MEDLINE]

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