Modulation of cytochemically detected dihydrofolate reductase during cell cycle.

Abstract

Dihydrofolate reductase (DHFR, EC 1.5.1.3) is an important enzyme involved in DNA metabolism. In this connection the cell cycle modulation of DHFR levels in HeLa S3 and HL 60 cell lines was investigated by flow cytometric analysis. A concentration of 4 micrograms/ml of aphidicolin was employed to synchronize the cell lines. DHFR was cytochemically detected… (More)

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