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. 2016 Feb 20;17:128. doi: 10.1186/s12864-016-2444-5

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© Tretina et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Length of the three types of intergenic region (IGR) length in the genomes of T. parva, T. annulata, T. orientalis, and T. equi. IGR length, shown in base pairs, correlates with the directionality of the transcriptional units that flank them. Boxplot shows median (orange line), second and third quartiles (within box) and max value below 75 % + 1.5 interquartile range and minimum value above 25 % - 1.5 interquartile range (whiskers). Comparisons of intergenic region types within each species were significantly different than each other (0.001 < p < 0.005, two-tailed Student’s t-test)