Microbial iron chelates, called siderophores, are synthesized by bacteria and fungi in response to low iron availability in the environment. The present review summarizes structural details of siderophore ligands with respect to their transport properties. This presentation is largely centred on the occurrence and function of siderophores in the various bacterial and fungal genera.

Biometals 2002: Third International Biometals Symposium: Focused Meeting Organized by S. Andrews (School of Animal and Microbial Sciences, University of Reading), R. Cammack, R. W. Evans, R. Hider and J. M. Wrigglesworth (Division of Life Sciences, King's College London), C. C. Cooper, P. S. Dobbin and M. T. Wilson (Department of Biological Sciences, University of Essex), N. J. Robinson (Department of Biochemistry and Genetics, University of Newcastle) and R. J. Simpson (Department of Endocrinology, Diabetes and Internal Medicine, King's College London), and Edited by R. W. Evans, R. Hider and J. M. Wrigglesworth (Division of Life Sciences, King's College London), and Sponsored by The Wellcome Trust, British Technology Group, Apotex, Italfarmaco, and the Inorganic Biochemistry Discussion Group, held at King's College London, London, 11–13 April 2002

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