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  • Title: Comparative genomic analysis of isolates belonging to the six species of the genus Thermus using pulsed-field gel electrophoresis and ribotyping.
    Author: Moreira LM, Da Costa MS, Sá-Correia I.
    Journal: Arch Microbiol; 1997 Aug; 168(2):92-101. PubMed ID: 9238100.
    Abstract:
    Fifty isolates belonging to the six validly described species of the genus Thermus (T. aquaticus, T. filiformis, T. thermophilus, T. scotoductus, T. brockianus, and T. oshimai) isolated from hot springs of different geographical areas were compared using macrorestriction analysis of genomic DNA and ribotyping. With the exception of presumed clones, the macrorestriction patterns of isolates obtained with EcoRI or NdeI were distinct. However, isolates belonging to the same species exhibited similar profiles particularly when they were isolated from the same hot spring. The estimated genomic size of strains of the Thermus spp. varied between approximately 1.8 and 2.5 Mbp. Ribotyping with BamHI and HindIII produced 30 and 35 distinct ribotypes, respectively. In spite of the variability of the hybridization patterns produced, the ribotypes obtained for isolates belonging to the same species also shared, in general, several fragments of identical size, and these fragments were similar when isolates originated from the same spring.
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