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Biogeochemistry

Mercury methylation made easy

An Erratum to this article was published on 30 January 2009

The exact mechanism used by microorganisms to produce the neurotoxin methyl mercury is unclear. The latest laboratory studies point to the amino acid cysteine as an important aid for the uptake of inorganic mercury and its transformation to methyl mercury in Geobacter sulfurreducens.

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Figure 1: Geobacter sulfurreducens; mercury uptake and methylation by this bacterium are significantly increased in the presence of the amino acid cysteine, according to Schaefer and Morel1.

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Sparling, R. Mercury methylation made easy. Nature Geosci 2, 92–93 (2009). https://doi.org/10.1038/ngeo428

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