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. 2010 Sep 29;11(9):R97. doi: 10.1186/gb-2010-11-9-r97

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Copyright ©2010 Naville and Gautheret; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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ABC-leaders. (a) The ABC-leader found upstream of the potABCD operon, encoding a spermidine/putrescine import system, in the Gammaproteobacteria Haemophilus somnus and Pasteurella multocida. (b) The ABC-leader found in the lactobacilli Lactobacillus gasseri and Lactobacillus johnsonii, upstream of a multidrug export system operon. (c) The T-box found in the Firmicutes Enterococcus faecalis and Lactobacillus sakei, upstream of genes for metal ion and methionine transporters, respectively. (d) The ABC-leader found in bacilli upstream of an alkanesulfonates transporter operon. (e) The ABC-leader found in bacilli 15-nucleotides upstream of a transporter of unknown specificity. Candidates are represented using the same conventions as in Figure 3.