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The effect of different chelators on biomass accumulation of wild-type cells. Biomass of wild-type cells after 90 h of growth in YBG11 containing 0.3 μm iron (A) and 10 μm iron (B) and amended with 0.3 to 3.0 μm (A) or 10 to 80 μm (B) chelator. Starter cultures were all grown on YGB11 containing 0.3 μm iron. DPTA, Diethylenetriaminopentaacetic acid.
