family Nr	COG description	functional class**	gene name	copy nr***
157	Uridylate kinase	F	PyrH	1.02
228	Ribosomal protein S17	J	RpsQ	1
351	Metal-dependent proteases with possible chaperone activity	O	QRI7	1
453	Translation initiation factor 1 (IF-1)	J	InfA	1.02
471	Ribosomal protein S11	J	RpsK	1
602	Glycine/serine hydroxymethyltransferase	E	GlyA	1.22
695	Ribosomal protein L4	J	RplD	1
833	Ribosomal protein S5	J	RpsE	1
849	Chaperonin GroEL (HSP60 family)	O	GroL	1.3
959	Ribosomal protein S15P/S13E	J	RpsO	1.01
1251	Glutamyl- and glutaminyl-tRNA synthetases	J	GlnS	1.1
1441	Methionine aminopeptidase	J	Map	1.28
1449	Translation initiation factor 3 (IF-3)	J	InfC	1.01
1532	NAD-dependent DNA ligase (contains BRCT domain type II)	L	Lig	1.03
1608	Ribosomal protein L13	J	RplM	1
1694*	replicative DNA helicase; intein/homing endonuclease	L	DnaB; -	1.11
1735	Ribosomal protein S10	J	RpsJ	1
1807	5,10-methylene-tetrahydrofolate dehydrogenase/Methenyl tetrahydrofolate cyclohydrolase	H	FolD	1.05
2015	Ribosomal protein L19	J	RplS	1
2137	Phenylalanyl-tRNA synthetase alpha subunit	J	PheS	1
2398	CTP synthase (UTP-ammonia lyase)	F	PyrG	1
2497	Ribosomal protein L22	J	RplV	1
2743*	signal recognition particle GTPase	U	FtsY; Ffh	2.01
2754	Ribosomal protein L7/L12	J	RplL	1
2930	tRNA-(guanine-N1)-methyltransferase	J	TrmD	1
3092	Uncharacterized conserved protein	S		1.15
3225	Dimethyladenosine transferase (rRNA methylation)	J	KsgA	1.1
3291	tmRNA-binding protein	O	SmpB	1
3631	Ribosomal protein L2	J	RplB	1
3647*	thioredoxin reductase; thiol-disulfide isomerase + thioredoxin	OC	TrxA; TrxB	1.42
3696*	EMAP domain; Methionyl-tRNA-synthetase	R; J	ARC1;MetG	1.04
3715	Enolase	G	Eno	1.05
3753	Mg-dependent DNase	L	TatD	1.45
3787	Aspartyl-tRNA synthetase	J	AspS	1.01
3833	3-phosphoglycerate kinase	G	Pgk	1
3946*	Guanylaat kinase; Uncharacterised component of phosphonate metabolism	F; P	Gmk; -	1.17
4412*	histidyl-tRNA-synthethase; -	J; E	HisS; HisZ	1.13
4728	Ribosomal protein S16	J	RpsP	1
4991*	DNA-directed RNA polymerase sigma subunit; specialised sigma subunit	K	RpoD; FliA	3.02
5044	Alanyl-tRNA synthetase	J	AlaS	1
7522	ATP-dependent Zn proteases	O	HflB	1.24
10112	DNA polymerase III, alpha subunit	L	DnaE	1.26
12204	Pentose-5-phosphate-3-epimerase	G	Rpe	1.23
13831	Ribosomal protein L9	J	RplI	1
16270	Ribosomal protein L24	J	RplX	1
16746	Glyceraldehyde-3-phosphate dehydrogenase/erythrose-4-phosphate dehydrogenase	G	GapA	1.57
20044	Methionyl-tRNA formyltransferase	J	Fmt	1.02
21512	Co-chaperonin GroES (HSP10)	O	GroS	1.13
31509*	DNaJ-class molecular chaperone; idem with c-term Zn-finger domain	O	CbpA; DNaJ	1.48
31578	Ribosomal protein S14	J	RpsN	1.21
31598	Nuclease subunit of the excinuclease complex	L	UvrC	1.02
31738	Ribosomal protein L17	J	RplQ	1
31762	Isoleucyl-tRNA synthetase	J	IleS	1.03
31782*	Topoisomerase A related	L	TopA	1.01
31925	Cysteinyl-tRNA synthetase	J	CysS	1.08
32194	Ribosomal protein S18	J	RpsR	1.04
32323	Arginyl-tRNA synthetase	J	ArgS	1.02
32496*	Ribosomal protein L21; -	J		1
32554*	Phosphotransferase system IIB components; triosephosphate isomerase	G	PtsG; TpiA	1.08
33097	Ribosomal protein L33	J	RpmG	1.28
33745	Predicted tRNA(5-methylaminomethyl-2-thiouridylate) methyltransferase	J	TrmU	1.05
34027	Diadenosine tetraphosphate (Ap4A) hydrolase and other HIT family hydrolases	FGR	Hit	1.11
34678	Ribosomal protein L35	J	RpmI	1
35599	rRNA methylases	J	SpoU	1.75
*	more than one COG in this family
**	full descriptions of functional classes can be found here http://www.ncbi.nlm.nih.gov/COG/
***	copy nr = average number of genes per strain