Classification of genes in COG functional categories.

A) Distribution of genes and pseudogenes in functional categories. Percentages signify the amount of pseudogenes in each category. A Pearson's Chi-squared test (see Materials and Methods) shows that the distribution of pseudogenes within COG categories is non-random. B) Residuals from the Pearson's Chi-squared test. Large positive values indicates a stronger overrepresentation of pseudogenes while large negative values indicate stronger underrepresentation. (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.