Summary
The mitochondrial DNA (mtDNA) of the true slime mould, Physarum polycephalum strain CH934xCH938, was isolated and characterized by restriction mapping. Cloned fragments of the mtDNA were assembled and used to construct the restriction map. This map showed that the mtDNA was a linear molecule of 86.0 kb with a tandem duplication of 19.6 kb. The terminal fragments were identified by sensitivity to Bal31 exonuclease. One of the duplications was located at the right end and the other was located 5 kb from the left end. Each duplicated segment contained 26 restriction sites for ten enzymes and these restriction sites were completely conserved in each duplication. Genes for the large and small rRNAs were mapped to positions about 30 kb from the right end of the mtDNA by hybridization with its own rRNAs. With the exception of a probe for the gene for the large rRNA in Tetrahymena pyriformis mtDNA, various probes from the mtDNAs of Saccharomyces cerevisiae and T. pyriformis showed no significant hybridization to any of the restriction fragments of the mtDNA from P. polycephalum.
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Takano, H., Kawano, S., Suyama, Y. et al. Restriction map of the mitochondrial DNA of the true slime mould, Physarum polycephalum: linear form and long tandem duplication. Curr Genet 18, 125–131 (1990). https://doi.org/10.1007/BF00312600
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DOI: https://doi.org/10.1007/BF00312600