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. 2003 Sep 20;4:43. doi: 10.1186/1471-2105-4-43

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Copyright © 2003 Yap et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.

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2-D plots for Figure 5 with different viewpoint specifications. The tetra-nucleotide usage patterns table in the additional file 2 (entire genome) for each virus have been redisplayed on the (1^stvs 2^nd), (1^stvs 3^rd) and (2^ndvs 3^rd) eigen-vector axes ('o' represents positive strand ssRNA virus, 'x' represents negative strand ssRNA virus). For the top figure, the order for 'o' is [3,7,1,4,2,5,6,17,13,20,10,16,9,8,11,15,12,14,18,19]* (left to right), whereas 'x' is [26,22,30,23,24,28,31,27,25,29,21]* (left to right). For the middle figure, the order for 'o' is [3,7,1,4,2,5,6,17,13,20,10,16,9,8,11,15,12,14,18,19]* (left to right), whereas 'x' is [26,22,30,23,24,28,31,27,25,29,21]* (left to right). For the bottom figure, the order for 'o' is [3,7,1,4,2,5,6,17,13,20,10,16,9,8,11,15,12,14,18,19]* (left to right), whereas 'x' is [26,22,30,23,24,28,31,27,25,29,21]* (left to right). *The corresponded virus for each number follows Figure 5.