In order to study and analyze the species and bacteriorhodopsin (BR) protein resource, a strain of extremely halophilic archaea AB3 was isolated.

为了研究分析嗜盐古生菌物种与细菌视紫红质(BR)蛋白基因资源，分离纯化得到极端嗜盐古生菌ab3。

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The third great domain of life, the archaea, look, under a microscope, like bacteria.

第三大“域”是古菌域，在显微镜下察看时，古菌看起来像细菌。

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As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal-yet their methane-generating properties are now a factor in climate-change calculations.

至于其重要性，古菌群在最开始被认定为自成一类时，也被视为无关紧要——但是它们释放甲烷的特性现在已被纳入气候变化的考察因素。

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The culprit, she believes, is a member of archaea known as Methanobrevibacter smithii, which is present in the intestinal tract of about 70% of people, but elevated in about 30%.

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Mathur focused on detecting methane in the breath, since animal studies found that the presence of a certain family of organisms called archaea, which are older than bacteria and colonize the gut, was linked with weight gain and conveniently released small amounts of methane gas.

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As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal yet their methane-generating properties are now a factor in climate-change calculations.

ECONOMIST: A new domain of life