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. 2012 Oct 5;12:198. doi: 10.1186/1471-2148-12-198

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Copyright ©2012 Nakajima et al.; 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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Distribution of the number and percentage of 5S (green bars) and 18S (red bars) rDNA clusters in 48 and 41 cichlid genomes, respectively. The species with polymorphic conditions were considered more than once. (a) Total number of sites, (b) number/percentage of sites in chromosomes with distinct morphology: telo/acrocentric (t/a), meta/submetacentric (m/sm); (c) number/percentage of proximal (p), interstitial (i) and terminal (t) sites; (d) distribution of number/percentage of sites in the distinct chromosomal arms: short (S), long (L), and in the centromeric (C) regions. The species Astatotilapia latifasciata and Laetacara dorsigera were excluded due their atypical number of 5S rDNA clusters.