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Appearance of a New Species of Ribonucleic Acid During Sporulation in Saccharomyces cerevisiae

Laboratory of Molecular Biology and Department of Bacteriology, University of Wisconsin, Madison, Wisconsin, 53706

ABSTRACT

In the course of study on ribonucleic acid (RNA) metabolism during sporulation in Saccharomyces cerevisiae, a new species of RNA (20S) was observed in sporulating cells by polyacrylamide gel electrophoresis. The relative content of this RNA to total RNA increased linearly early in sporulation. Labeled adenine was preferentially incorporated into 20S RNA during the early stages of sporulation. The correlation between the physiological and genetic control of sporulation and the synthesis of 20S RNA are discussed.

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