Altered DNA ligase I activity in Bloom's syndrome cells.

Abstract excerpt

Cells from patients with Bloom's syndrome, a rare disease associated with increased cancer frequency, exhibit cytological abnormalities. These include increased numbers of homologous chromatid interchange figures and sister-chromatid exchanges, together with abnormally slow replicon-fork progression and retarded rate of DNA-chain maturation, and suggest that the primary defect in this recessive disorder affects...

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