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The isolate possesses the unusual property of precipitating Pb(II) simply by using cysteine, which can be degraded intracellularly to hydrogen sulfide (H2S). H2S is then shipped into the extracellular environment to react with Pb(II), producing PbS (galena). Biochemical and development tests showed that various other sulfur sources tested (sulfate, thiosulfate, and methionine) weren't reduced to hydrogen sulfide. Making use of equimolar concentration of cysteine, 1 mM of soluble Pb(II) was removed from
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