Table 2.

K31 and NA1000 gene counts by COG category. Source: img.jgi.doe.gov.

COG category	K31 gene count	% of total n = 4109	NA1000 gene count	% of total n = 3037
amino acid transport and metabolism	260	6.33	222	7.31
carbohydrate transport and metabolism	219	5.33	157	5.17
cell cycle control, cell division and chromosome partitioning	33	0.80	23	0.76
cell motility	71	1.73	66	2.17
cell wall/membrane/envelope biogenesis	244	5.94	195	6.42
chromatin structure and dynamics	3	0.07	2	0.07
coenzyme transport and metabolism	132	3.21	114	3.75
defense mechanisms	71	1.73	45	1.48
energy production and conversion	231	5.62	165	5.43
function unknown	416	10.12	336	11.06
general function prediction only	483	11.75	344	11.33
inorganic ion transport and metabolism	220	5.35	153	5.04
intracellular trafficking, secretion and vesicular transport	137	3.33	83	2.73
lipid transport and metabolism	269	6.55	171	5.63
nucleotide transport and metabolism	75	1.83	71	2.34
post-translational modification, protein turnover and chaperones	155	3.77	130	4.28
replication, recombination and repair	222	5.40	127	4.18
secondary metabolites biosynthesis, transport and catabolism	163	3.97	100	3.29
signal transduction mechanisms	190	4.62	155	5.10
transcription	346	8.42	212	6.98
translation, ribosomal structure and biogenesis	169	4.11	166	5.47
not in COGs	1830	33.28	1178	29.95