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Table 4 Rank correlations coefficients between CRISPR spacers and selected Cas proteins

From: A putative RNA-interference-based immune system in prokaryotes: computational analysis of the predicted enzymatic machinery, functional analogies with eukaryotic RNAi, and hypothetical mechanisms of action

Values selected for correlation

Rank Correlation coefficienta

Number of spacers vs S.D. of spacer lengths

0.398

Number of spacers vs number of COG1518 proteins

0.475

Number of spacers vs number of RAMPs

0.668

Number of spacers vs number of COG1517 proteins

0.524

Number of spacers vs total number of Cas proteins minus RAMPs

0.580

Number of spacers vs total number of Cas proteins minus RAMPs and COG1517 proteins

0.556

Number of RAMPs vs S.D. of spacer lengths

0.651

  1. aAll correlation coefficients are highly statistically significant P < 10-3
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