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A Halobacterium species isolated from solar evaporation ponds and sodium sesquicarbonate deposits at Lake Magadi, Kenya, differs from known species of Halobacterium in its GC content, in being obligately alkalophilic with a pH optimum between 9·0 and 10·0, and in having a Mg2+ requirement of between 0·1 and 2·0 mm for optimum growth.
Tindall et al. (Tue,) studied this question.