Transfection of BLM into cultured bloom syndrome cells reduces the sister-chromatid exchange rate toward normal.

Abstract excerpt

The gene BLM, mutated in Bloom syndrome (BS), encodes the nuclear protein BLM, which when absent, as it is from most BS cells, results in genomic instability. A manifestation of this instability is an excessive rate of sister-chromatid exchange (SCE). Here we describe the effects on this abnormal cellular phenotype of stable transfection of normal BLM cDNAs into two types of BS cells, SV40-transformed fibroblasts...

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