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  • Title: Semiautomated autoradiographic measurement of DNA repair in normal and xeroderma pigmentosum cultured human fibroblasts.
    Author: Kraemer KH, Buchanan JK, Stinson SF.
    Journal: In Vitro; 1980 Jul; 16(7):609-15. PubMed ID: 7409831.
    Abstract:
    Assessment of DNA repair in cultured human fibroblasts by autoradiography may be facilitated by using semiautomated grain counting instruments. The instrument-determined number of autoradiographic grains per nucleus in cultured human skin fibroblasts was found to be linear in comparison to visual counts up to only 30 grains per nucleus. However, with two different instruments a greater range of linearity (to 100 to 120 grains per nucleus) was attained by measuring the grain surface area per nucleus. Semiautomated analysis of the grain surface area per nucleus yielded measurements of relative rates of unscheduled DNA synthesis after ultraviolet irradiation in xeroderma pigmentosum and normal human fibroblasts, which were reproducible and rapid.
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