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. 2015 May 7;16(1):359. doi: 10.1186/s12864-015-1555-8

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© Wang et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Position-specific nucleotide composition features of transcription border regions or promoters. Nucleotide composition at TSSs (A) or TTSs (B) predicted using the empirical method. The position ‘0’ represents the TSS or TTS, minus values represent upstream positions and positive values represent downstream positions. Nucleotide composition of the −10 region of putative sigma 38 binding sites (C) or the −35 and −10 regions of putative sigma 70 binding sites (D) identified in the S. Typhimurium 14028s chromosome.