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Table 3 Breakdown of the false-CRISPRs found in existing collections of CRISPRs

From: Not all predicted CRISPR–Cas systems are equal: isolated cas genes and classes of CRISPR like elements

  Biswas’ collection [29] CRISPRBank [30] CRISPRMap [31]
Total # of CRISPRs # of clusters # of singletons Total # of CRISPRs # of clusters # of singletons Total # of CRISPRs # of clusters # of singletons
Tandem repeats 68 20 39 46 22 21 21 11 6
STAR-like elements 14 2 0 18 4 0 12 4 0
Simple repeats 2 0 1 4 1 3 7 1 5
Unknown 78 17 49 123 30 77 58 14 28
Total 162 39 89 191 57 101 98 30 39