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. 2012 May 1;6(2):165–173. doi: 10.4056/sigs.2705996

Table 4. Number of genes associated with the 25 general COG functional categories.

Code     Value      % age      Description
J     201      4.27      Translation, ribosomal structure and biogenesis
A     1      0.02      RNA processing and modification
K     481      10.22      Transcription
L     160      3.40      Replication, recombination and repair
B     1      0.02      Chromatin structure and dynamics
D     37      0.79      Cell division and chromosome partitioning
Y     0      0.00      Nuclear structure
V     64      1.36      Defense mechanisms
T     187      3.97      Signal transduction mechanisms
M     265      5.63      Cell envelope biogenesis, Outer membrane
N     94      2.00      Cell motility and secretion
Z     0      0.00      Cytoskeleton
W     0      0.00      Extracellular structure
U     116      2.47      Intracellular trafficking and secretion
O     153      3.25      Posttranslational modification, protein turnover, chaperones
C     272      5.78      Energy production and conversion
G     424      9.01      Carbohydrate transport and metabolism
E     470      9.99      Amino acid transport and metabolism
F     106      2.25      Nucleotide transport and metabolism
H     185      3.93      Coenzyme metabolism
I     135      2.87      Lipid metabolism
P     285      6.06      Inorganic ion transport and metabolism
Q     133      2.83      Secondary metabolite biosynthesis, transport and catabolism
R     537      11.41      General function prediction only
S     398      8.46      Function unknown
-     918      17.86      Not in COGs