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Table 1 COG codes for general function and pathway/systems

From: Microarray analysis of orthologous genes: conservation of the translational machinery across species at the sequence and expression level

Code Genes Description
General function
  416 Information storage and processing
J 242 Translation, ribosomal structure and biogenesis
K 80 Transcription
L 94 DNA replication, recombination and repair
  429 Metabolism
C 62 Energy production and conversion
G 71 Carbohydrate transport and metabolism
E 153 Amino acid transport and metabolism
F 50 Nucleotide transport and metabolism
H 54 Coenzyme metabolism
I 39 Lipid metabolism
  226 Cellular processes
D 4 Cell division and chromosome partitioning
O 98 Posttranslational modification, protein turnover, chaperones
M 9 Cell envelope biogenesis, outer membrane
N 6 Cell motility and secretion
P 71 Inorganic ion transport and metabolism
T 38 Signal transduction mechanisms
  127 Poorly characterized
R 119 General function prediction only
S 8 Function unknown
- 613 No pathway/system assigned
C1 2 Pyruvate decarboxylation
C2 18 TCA cycle
C3 3 Glyoxylate bypass
E1 6 Arginine biosynthesis
E2 3 Phenylalanine/tyrosine biosynthesis
E3 3 Tryptophan biosynthesis
E4 2 Threonine biosynthesis
E5 1 Isoleucine biosynthesis
E7 19 Leucine biosynthesis
E8 7 Methionine biosynthesis
E9 4 Proline biosynthesis
E10 4 Histidine biosynthesis
F1 15 Purine biosynthesis
F2 3 Purine salvage
F3 12 Pyrimidine biosynthesis
F4 2 Pyrimidine salvage
F5 7 Thymidylate biosynthesis
G1 4 Glycolysis
G2 14 Gluconeogenesis
G3 6 Pentose phosphate pathway
G4 4 Entner-doudoroff pathway
H1 8 Heme biosynthesis
H3 2 FAD biosynthesis
H4 7 Biotin biosynthesis
H5 1 NAD biosynthesis
H6 7 Ubiquinone biosynthesis
H7 3 Menaquinone biosynthesis
H8 2 Thiamine biosynthesis
H9 1 Pyridoxal phosphate biosynthesis
I1 10 Fatty acid biosynthesis
J1 26 Translation factors and enzymes involved in translation
J2 30 Aminoacyl-tRNA synthetases, amino acid activation
J3 47 Ribosomal proteins - small subunit
J4 77 Ribosomal proteins - large subunit
K1 14 DNA-dependent RNA polymerase subunits
K2 7 Basal transcription factors
K3 2 Transcriptional regulators
L1 20 Basal replication machinery
  1. The COG letter-codes for general function and pathway/system categories are given the first column (Code). The Genes column holds the number of genes in the microarray data studied that were found for each functional class. The last column (Description) gives the description for each category.