Table 1.

List of genes common among sequenced genomes of Clostridium strains (www.ncbi.nlm.nih.gov)

S. No.	Gene	Function/encoded protein	Frequencya
Housekeeping genes
1	clpB	ATP-dependent chaperone ClpB	24/27
2	clpX	ATP-dependent Clp protease, ATP-binding subunit ClpX	26/27
3	dnaA	Chromosomal replication initiator protein DnaA	26/27
4	dnaJ	Chaperone protein DnaJ	27/27
5	ftsA	Cell division protein FtsA	26/27
6	ftsY	Signal recognition particle-docking protein FtsY	25/27
7	ftsZ	Cell division protein FtsZ	27/27
8	galE	UDP-glucose 4-epimerase	25/27
9	grpE	Co-chaperone GrpE	27/27
10	lepA	GTP-binding protein LepA	27/27
11	lexA	LexA repressor	27/27
12	minC	Septum site-determining protein MinC	27/27
13	minD	Septum site-determining protein MinD	26/27
14	mutS	DNA mismatch repair protein MutS	27/27
15	nusG	Transcription termination/antitermination factor NusG	27/27
16	recA	Protein RecA	26/27
17	recJ	Single-stranded-DNA-specific exonucleaseRecJ	26/27
18	recN	DNA repair protein RecN	26/27
19	recR	Recombination protein RecR	27/27
20	ruvA	Holliday junction DNA helicase RuvA	27/27
21	ruvB	Holliday junction DNA helicase RuvB	27/27
22	secA	Preproteintranslocase, SecA subunit	27/27
Other genes
23	cbiD	Cobalamin biosynthesis protein CbiD	25/27
24	cbiM	Cobalamin biosynthesis protein CbiM	27/27
25	cbiQ	Cobalt ABC transporter, permease protein CbiQ	25/27
26	cbiT	Precorrin-6Y C5,15-methyltransferase (decarboxylating), CbiT	24/27
27	hrcA	Heat-inducible transcription repressor HrcA	27/27

^aSee Table S5–S7