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J Bacteriol. 1968 July; 96(1): 184-190
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Nucleotide Composition of Nuclear and Mitochondrial Deoxyribonucleic Acid of Fungi

¹ Department of Biology, Rice University, Houston, Texas 77001

ABSTRACT

The buoyant density of nuclear and mitochondrial deoxyribonucleic acid (DNA) from 14 species of fungi was determined by CsCl density gradient equilibrium centrifugation. The buoyant density of both types of DNA was the same for all three Mucorales analyzed. The buoyant density of mitochondrial DNA was significantly lower than that of the nuclear DNA for nine species of Ascomycetes and two species of Basidiomycetes. No simple correlation could be obtained from the comparison of the two types of DNA. Mitochondrial DNA represented a very small proportion of total DNA. Heat-denatured mitochondrial DNA renatured more readily than nuclear DNA.

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