TABLE 2.

CRISPR diversity in S. thermophilus

ParameterCRISPR1CRISPR2CRISPR3
No. of strains analyzed1246566
No. of strains with locus (%)124 (100)59 (90.8)53 (80.3)
No. of unique arrangements (%)105 (84.7)7 (11.9)20 (37.7)
Avg no. of spacers per locus ± SD22.9 ± 10.42.9 ± 1.113.2 ± 5.2
Minimum no. of spacers per locus200
Maximum no. of spacers per locus51829
Total no. of spacers2,829173624
No. of unique spacers (%)782 (27.6)16 (9.2)154 (24.7)