Table 1.

Genomes used in this study

					Predicted Operons
Organism1	Genbank Accession	Annotation date	Sequencing group3	Locus tag	monocistronic	polycistronic	total
Bw KBAB4	NC_010184	05/2010	HAU	KBAB	2106	809	2915
Bc B4264	NC_011725	12/2008	JCVI	BCB	2187	855	3042
Bc ATCC14579	NC_004722	03/2003	INRAGM	BC	2163	840	3003
Bt BMB171	NC_014171	05/2010	HAU	BMB	2135	837	2972
Bc G9842	NC_011772	10/2008	JCVI	BCG	2271	847	3118
Bc Q1	NC_011969	01/2009	MGCC	BCQ	2005	855	2860
Bc AH187	NC_011658	12/2008	JCVI	BCAH187	2199	858	3057
Bc ATCC10987	NC_003909	09/2004	TIGR	BCE	2397	825	3222
Ba Ames Ancestor	NC_007530	03/2003	TIGR	GBAA	2146	841	2987
Ba Ames	NC_003997	03/2003	TIGR	BA	2081	834	2915
Ba A0248	NC_012659	05/2009	LANL	BAA	1995	821	2816
Ba Sterne2	NC_005945	01/2004	JGI	BAS	2245	938	3183
Ba CDC 684	NC_012581	04/2009	LANL	BAMEG	2245	861	3106
Bc E33L	NC_006274	11/2004	JGI	BCZK	1930	842	2772
Bc 03BB102	NC_012472	03/2009	LANL	BCA	2135	857	2992
Bt Al-Hakam	NC_008600	11/2006	JGI	BALH	1812	817	2629
Bc CI	NC_014335	07/2010	GGL	BACI	1963	862	2825
Bc AH820	NC_011773	10/2008	JCVI	BCAH820	2168	858	3026
Bt konkukian 97-27	NC_005957	12/2004	JGI	BT	1907	844	2751
Bcy NVH-391-98	NC_009674	07/2007	JGI	Bcer98	1687	589	2276

¹ Ba, B. anthracis, Bc, B. cereus, Bt, B. thuringiensis, Bw, B. weihenstephanensis, Bcy, B. cytotoxicus.

² Operon data experimentally determined by Passalacqua et al.[28].

³JGI: Joint Genome Institute.

LANL: Los Alamos National Labs.

JCVI: J. Craig Venter Institute.

TIGR: The Institute for Genome Research.

INRAGM: INRA Genetique Microbienne.

MGCC: Microbial Genome Center of Chinese Ministry of Public Health.

HAU: Huazhong Agricultural University.

GGL: Goettingen Genomics Laboratory.