Distribution of GI, sGCS, and PAIs in the genome. (A) Scatter plot of the positions of GIs vs. sGCSs. For each genome, we coupled the positions of sGCSs and GIs. (B) Distribution of sGCSs, GIs, and PAIs in the genome. (C) Frequency of Ds along the genome with different sGCSs groups. (D) Gene classification according to COG functions in GIs (red) and all of the genomes. For each category: A, RNA processing and modification; B, Chromatin structure and dynamics; C, Energy production and conversion; D, Cell cycle control, cell division, chromosome partitioning; E, Amino acid transport and metabolism; F, Nucleotide transport and metabolism; G, Carbohydrate transport and metabolism; H, Coenzyme transport and metabolism; I, Lipid transport and metabolism; J, Translation, ribosomal structure, and biogenesis; K, Transcription; L, Replication, recombination, and repair; M, Cell wall/membrane/envelope biogenesis; N, Cell motility; O, Posttranslational modification, protein turnover, chaperones; P, Inorganic ion transport and metabolism; Q, Secondary metabolites biosynthesis, transport and catabolism; R, General function prediction only; S, Function unknown; T, Signal transduction mechanisms; U, Intracellular trafficking, secretion, and vesicular transport; V, Defense mechanisms; and W, Cytoskeleton.