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Global Gene Expression Analysis of Iron-Inducible Genes in Magnetospirillum magneticum AMB-1

Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan

Received 20 September 2005/ Accepted 5 December 2005

Iron uptake systems were identified by global expression profiling of Magnetospirillum magneticum AMB-1. feo, tpd, and ftr, which encode ferrous iron transporters, were up-regulated under iron-rich conditions. The concomitant rapid iron uptake and magnetite formation suggest that these uptake systems serve as iron supply lines for magnetosome synthesis.

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