Additional file 4.

Distribution of nTE sequence frequency within introns of Brachypodium (A), rice (B), sorghum (C) and maize (D). The left and right starting points represent the 5 and 3 borders of introns, respectively. Colors of superfamilies are the same as in Figure  1.

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Han et al. BMC Genomics 2013 14:71   doi:10.1186/1471-2164-14-71