Abstract:Magnetotactic bacteria (MTB) produce single- or multi-stranded chains of magnetic nanoparticles that contribute to the magnetization of sedimentary rocks. Their magnetic fingerprint can be detected in ancient geological samples, and serve as a unique biosignature of microbial life. However, fossilized assemblages bear contradictory signatures pointing to magnetic components that have distinct origin(s). Here, we produce mutant bacteria to mimic MTB producing multi-stranded chains that cannot be cultivated in t… Show more
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