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  • Title: Physical map of the Methanobacterium thermoautotrophicum Marburg chromosome.
    Author: Stettler R, Leisinger T.
    Journal: J Bacteriol; 1992 Nov; 174(22):7227-34. PubMed ID: 1429448.
    Abstract:
    A physical map of the Methanobacterium thermoautotrophicum Marburg chromosome was constructed by using pulsed-field gel electrophoresis of restriction fragments generated by NotI, PmeI, and NheI. The order of the fragments was deduced from Southern blot hybridization of NotI fragment probes to various restriction digests and from partial digests. The derived map is circular, and the genome size was estimated to be 1,623 kb. Several cloned genes were hybridized to restriction fragments to locate their positions on the map. Genes coding for proteins involved in the methanogenic pathway were located on the same segment of the circular chromosome. In addition, the genomes of a variety of thermophilic Methanobacterium strains were treated with restriction enzymes and analyzed by pulsed-field gel electrophoresis. The sums of the fragment sizes varied from 1,600 to 1,728 kb among the strains, and widely different macrorestriction patterns were observed.
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