| 摘要 |
This invention provides methods for identifying lymphocytes with a mutator phenotype by isolating lymphocytes bearing a selectable marker; identifying among the lymphocytes a population belonging to the same clonally amplified set; and determining whether the population has at least two lymphocytes having, between them, two independent mutations among different alleles at the gene locus of the selectable marker; the presence of which indicates a mutator phenotype. In one embodiment of the invention, the selectable marker is hprt?-?.
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