期刊
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
卷 80, 期 1, 页码 128-137出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.02282-13
关键词
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资金
- John Henry Garner Scholarship at the University of Leeds
The biochemical and molecular mechanisms used by alkaliphilic bacterial communities to reduce metals in the environment are currently unknown. We demonstrate that an alkaliphilic (pH > 9) consortium dominated by Tissierella, Clostridium, and Alkaliphilus spp. is capable of using iron (Fe3+) as a final electron acceptor under anaerobic conditions. Iron reduction is associated with the production of a freely diffusible species that, upon rudimentary purification and subsequent spectroscopic, high-performance liquid chromatography, and electrochemical analysis, has been identified as a flavin species displaying properties indistinguishable from those of riboflavin. Due to the link between iron reduction and the onset of flavin production, it is likely that riboflavin has an import role in extracellular metal reduction by this alkaliphilic community.
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