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. 2012 May 15;6(2):265–275. doi: 10.4056/sigs.2655905

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

Code     value      %age       Description
J     173      3.6       Translation, ribosomal structure and biogenesis
A     3      0.1       RNA processing and modification
K     509      10.7       Transcription
L     226      4.7       Replication, recombination and repair
B     3      0.1       Chromatin structure and dynamics
D     40      0.8       Cell cycle control, cell division, chromosome partitioning
Y     0      0.0       Nuclear structure
V     68      1.4       Defense mechanisms
T     220      4.6       Signal transduction mechanisms
M     191      4.0       Cell wall/membrane biogenesis
N     6      0.1       Cell motility
Z     0      0.0       Cytoskeleton
W     0      0.0       Extracellular structures
U     52      1.1       Intracellular trafficking and secretion, and vesicular transport
O     152      3.2       Posttranslational modification, protein turnover, chaperones
C     369      7.7       Energy production and conversion
G     294      6.2       Carbohydrate transport and metabolism
E     381      8.0       Amino acid transport and metabolism
F     93      2.0       Nucleotide transport and metabolism
H     223      4.7       Coenzyme transport and metabolism
I     291      6.1       Lipid transport and metabolism
P     210      4.4       Inorganic ion transport and metabolism
Q     264      5.5       Secondary metabolites biosynthesis, transport and catabolism
R     649      13.6       General function prediction only
S     364      7.6       Function unknown
-     1,523      26.4       Not in COGs