Toc: Content: Contributors to volume 43 Pages ix-x Metal ion transport in eukaryotic microorganisms: insights from Saccharomyces cerevisiae Review Article Pages 1-38 David J Eide Iron uptake by fungi: Contrasted mechanisms with internal or external reduction Review Article Pages 39-74 Nicola G De Luca, Paul M Wood Dynamics of metabolism and its interactions with gene expression during sporulation in Saccharomyces cerevisiae Review Article Pages 75-115 Sonia Cortassa, Juan C Aon, Miguel A Aon, John F.T Spencer Carbon and nitrogen metabolism in Rhizobium Review Article Pages 117-163 Philip Poole, David Allaway Redundancy of aerobic respiratory chains in bacteria? Routes, reasons and regulation Review Article Pages 165-224 Robert K. Poole, Gregory M. Cook Author index Pages 225-237 Subject index Pages 239-243