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Ch2, a Novel Halophilic Archaeon from an Australian Solar Saltern

Department of Microbiology, University of Melbourne, Parkville, Victoria 3052, Australia

^* Corresponding author.

ABSTRACT

A novel halophilic archaeon, strain Ch2, was isolated from a marine solar saltern in Geelong, Australia. The fact that this organism had a dam-methylated genome suggested that it is closely related to the taxon that includes Halobacterium saccharovorum, Halobacterium sodomense, and Halobacterium trapanicum. A sequence analysis of the 16S rRNA gene (Ch2 has three copies of this gene) showed that Ch2 is phylogenetically equidistant from the genera Haloarcula and Haloferax and closely related to H. saccharovorum. The susceptibility of both Ch2 and H. saccharovorum to the recently isolated halophage HF2 supported the hypothesis that these two organisms are closely related.

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