Table 2.

CRISPR Array Statistics

					Component with Largest Number of Arrays
Data Set	No. Unique Arrays	Mean No. Spacers	Median No. Spacers	Avg. Pairwise Shared Spacers	No. Arrays	Avg. Pairwise Shared Spacers
E. coli CRISPR1.1
Unique	356	11.145	10	1.16	353	1.193
No order inversions, unique	299	9.666	8	0.9308	294	0.962
E. coli CRISPR1.2
Unique	348	10.112	9	0.358	161	0.6825
No order inversions, unique	324	8.852	8	0.2513	156	0.5875
E. coli CRISPR2.1
Unique	41	9.073	9	1.045	27	1.997
No order inversions, unique	38	8.184	8	0.667	15	2.4
E. coli CRISPR2.2
Unique	44	11.318	11	1.739	32	3.008
No order inversions, unique	34	8.588	9	1.021	23	1.925
P. aeruginosa
Unique	198	13.87	13	0.2936	148	0.4875
No order inversions, unique	191	13.41	12	0.272	141	0.4578
S. agalactiae
Unique	210	11.69	10.5	0.6394	139	1.143
No order inversions, unique	204	8.7	8	0.3067	131	0.5948
S. thermophilus
Unique	70	23.07	23	0.7627	26	1.523
No order inversions, unique	70	21.23	20	0.7288	26	1.523