Three complementation groups in Cockayne syndrome - PubMed (original) (raw)
Three complementation groups in Cockayne syndrome
A R Lehmann. Mutat Res. 1982 Dec.
Abstract
After 16 Jm-2 of UV-irradiation non-dividing normal cells recover normal rates of RNA synthesis within 24 h, whereas in cells from donors with Cockayne syndrome (CS) the rate of RNA synthesis gradually declines. Cultures of a mixed population from 2 CS donors were fused with polyethylene glycol; subsequently they were UV-irradiated and RNA synthesis was measured autoradiographically in mono-, bi-, and multinuclear cells. Genetic complementation was indicated by high levels of RNA synthesis in bi- and multinuclear cells when compared with mononuclear cells. Using this assay, 11 CS strains have been assigned to three complementation groups: 2 into group A, 8 into group B and 1 into group C. The strain in group C is derived from an individual who also had xeroderma pigmentosum (XP), and was the sole known representative of XP-complementation group B.
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