Phylogenetic analysis of oxygen-utilizing and -producing enzymes indicates an early emergence of an oxygenated biosphere, providing phylogenetic insight into a question that has more commonly been approached from the basis of fossils and geochemical tracers.

中文翻译：

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地球氧化之前的全球有氧运动

对利用和产生氧气的酶的系统发育分析表明含氧生物圈的早期出现，为从化石和地球化学示踪剂的基础更常见的问题提供了系统发育洞察力。