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. 2011 Apr 18;2:79. doi: 10.3389/fmicb.2011.00079

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Copyright © 2011 Beard, Paradela, Albar and Jerez.

This is an open-access article subject to a non-exclusive license between the authors and Frontiers Media SA, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and other Frontiers conditions are complied with.

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Proposed model for A. ferrooxidans extracellular sulfur globules production. OM, outer membrane; PE, periplasmic space; IM, inner membrane; [S°], sulfur globule; TD, thiosulfate dehydrogenase; TTH, tetrathionate hydrolase; T3H, trithionate hydrolase. Diffusion of substrates across the outer membrane is shown by black arrows. Continuous arrows show enzymatic steps and broken arrows show non-enzymatic steps. Reactions that do not proceed in OLC-incubated cells are indicated by thick empty arrows. See text for details.