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Biomass formation of wild-type strain QM9414 in the presence of different sulphur concentrations. Biomass accumulation was measured after growth for 96 hours in either complete darkness or constant light (1800 lux, 25 μmol photons m-2s-1) on sulphate free Mandels-Andreotti medium with 1% (w/v) of microcrystalline cellulose as carbon source supplemented with 0.05, 0.25 or 5 mM methionine. Values were normalized to growth on 0.25 mM methionine in constant darkness.
