Abstract
THE metabolic activity of certain micro-organisms is well known to be dependent on the iron concentration of the culture medium. For example, where cultured at controlled levels of iron, Corynebacterium diphtheriae 1 and Aspergillus niger 2 produce large amounts of toxin and citric acid respectively. Recently we have reported3 the production of ferrichrome A by Ustilago sphaerogena when this fungus is grown under conditions of controlled iron supply.
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References
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GARIBALDI, J., NEILANDS, J. Formation of Iron-binding Compounds by Micro-organisms. Nature 177, 526–527 (1956). https://doi.org/10.1038/177526a0
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DOI: https://doi.org/10.1038/177526a0
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