A temperature-sensitive Dna- mutant (ts T244) of the mouse FM3A cell line was characterized. ts T244 showed no increase in cell number and rapid decrease in the rate of DNA synthesis after temperature upshift (33°C→39°C). The activity of nuclear DNA polymerase α decreased as rapidly as the rate of DNA synthesis, whereas the activities of thymidine kinase and thymidylate kinase decreased more slowly. The results suggest that the level of nuclear DNA polymerase α has close relation to the ts defect of this Dna- mutant.
|Original language||English (US)|
|Number of pages||6|
|Journal||Biochemical and Biophysical Research Communications|
|State||Published - Dec 14 1979|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology