Table 2.

Protein functional classes, partitioned into higher categories.

Information storage and processing
J	Translation, ribosomal structure and biogenesis
K	Transcription
L	Replication, recombination and repair
Cellular processes and signaling
D	Cell cycle control, cell division, chromosome partitioning
V	Defense mechanisms
T	Signal transduction mechanisms
M	Cell wall/membrane/envelope biogenesis
N	Cell motility
U	Intracellular trafficking, secretion, and vesicular transport
O	Posttranslational modification, protein turnover, chaperones
Metabolism
C	Energy production and conversion
G	Carbohydrate transport and metabolism
E	Amino acid transport and metabolism
F	Nucleotide transport and metabolism
H	Coenzyme transport and metabolism
I	Lipid transport and metabolism
P	Inorganic ion transport and metabolism
Q	Secondary metabolites biosynthesis, transport and catabolism
Poorly characterized
X	Function unknown or general function prediction only