Additional file 4.
PCA of individual gene features. Results of PCA of frequencies of sequence words within individual gene features in Dm chromosome arms. Chromosomes colour-coded, and gene features indicated by symbols as follows: green = X, magenta = 3R, brown = 2R, blue = 3L, yellow = 2L; ∇ = promoter, Δ = 5'UTR, □ = CDS, O = intron, + = 3'UTR, × = intergenic. (A), (B), (C), (D), (E) and (F) show 1st vs 2nd component score plots (R2cum = 0.473, 0.478, 0.759, 0.821, 0.565 and 0.791, respectively) of the AT-normalized 2-6 mer promoter, 5' UTR, coding sequence, intron, 3' UTR and intergenic sequence analyses, respectively.
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Philip et al. BMC Genomics 2012 13:97 doi:10.1186/1471-2164-13-97