Giant yeast cells with nonrecyclable ribonucleotide reductase.

Abstract excerpt

Ribonucleotide reductase (RNR) catalyzes the reduction of ribonucleotides to deoxyribonucleotides and thereby provides the precursors required for DNA synthesis and repair. In an attempt to test cell resistance to a permanent replicational stress, we constructed a mutant Saccharomyces cerevisiae strain containing exclusively nonrecyclable catalytic subunits of RNR that become inactivated following the reduction...

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