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Table 2 Summary of the statistical results using the Wilcoxon rank-sum test for CRISPR type I-C and PAM GAA

From: Motif depletion in bacteriophages infecting hosts with CRISPR systems

r PAM     
CRISPR- CRISPR+ Difference p-value Strain resampling Method
Bacteria: 12 (47) CRISPR+, 117 (641) CRISPR-   
0.01883 -0.02136 0.04019 0.007858 99 res
0.1169 0.1082 0.008770 0.009564 99  
Bacillus: 2 (18) CRISPR+, 4 (18) CRISPR-   
0.09768 0.1080 -0.01033 0.1916 - res
0.08673 0.1773 -0.09062 0.0004285 100 sub
Lactobacillus: 1 (3) CRISPR+, 6 (13) CRISPR-   
-0.02019 -0.01306 -0.007136 0.6107 - res
0.005076 -0.04924 0.05421 0.5214 - sub
Streptococcus: 3 (9) CRISPR+, 7 (22) CRISPR-   
-0.04927 -0.5889 0.5397 4.464e-06 100 res
-0.03720 -0.4635 0.4263 1.19e-0.06 100 sub
Streptococcus (extended)   
-0.06292 -0.3772 0.3143 1.965e-05 99 res
-0.04374 -0.3208 0.2771 1.223e-05 99 sub
  1. For each data set, the number of species (strains) in CRISPR+ and CRISPR-, respectively, is given. Median of rPAM (log-ratio of the PAM) is given for CRISPR+ and CRISPR-. “Difference” is the difference of these values, positive values indicate underrepresentation of the PAM in CRISPR+. Column “Strain resampling”: for significant results, resampling to a uniform species distribution, number of significant (p < 0.05) outcomes out of 100. Column “Method”: “res” - resampling method, “sub” - substring method.
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