Dna repair synthesis in human heterokaryons: II. a test for heterozygosity in xeroderma pigmentosum and some insight into the structure of the defective enzyme
Abstract:Heterokaryons between fibroblasts from patients with classical Xeroderma pigmentosum (X.P.) and fibroblasts from normal or heterozygous subjects have indicated that normal cells contain at least three- to fourfold the amount of ‘X.P.-enzyme’ necessary for maximal unscheduled DNA synthesis and that the reduced enzyme levels in heterozygotes can be detected using heterokaryons with a high ratio of X.P. to heterozygous nuclei. Furthermore, a kinetic study of complementation in heterokaryons suggests that the ‘X.P… Show more
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