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Table 2 Vertebrate microRNA clusters. The table lists the maximal number of microRNAs in a single copy of the cluster ("Members"), the maximal number of non-homologous microRNAs in a single copy ("Families"), and the maximal number of paralogous cluster copies in any of the investigated genomes.

From: The expansion of the metazoan microRNA repertoire

Cluster Members Families Paralogs
let-7 3 3 18
mir-1 2 2 4
mir-2 4 2 5
mir-3 9 6 3
mir-9 4 3 7
mir-12 2 2 1
mir-15 2 1 5
mir-17 6 3 9
mir-23 3 3 6
mir-29 3 2 8
mir-30 2 1 3
mir-34 2 2 3
mir-35 7 7 1
mir-42 3 3 2
mir-46 2 2 5
mir-51 4 4 1
mir-54 3 3 1
mir-61 2 2 1
mir-64 4 4 1
mir-73 2 2 1
mir-77 2 1 1
mir-96 3 3 2
mir-105 3 1 1
mir-127 2 1 * 2
mir-130 2 2 5
mir-132 2 1 2
mir-134 >50 6 * 1
mir-141 2 1 * 2
mir-143 2 2 1
mir-181 2 1 8
mir-191 2 2 * 1
mir-192 2 2 2
mir-202 2 1 1
mir-204 2 1 3
mir-216 2 1 2
mir-221 2 1 4
mir-232 2 1 1
mir-249 2 1 1
mir-275 2 2 1
mir-276 2 1 1
mir-290 6 1 6
mir-296 2 1 2
mir-302 5 2 5
mir-310 4 4 1
mir-344 3 1 1
mir-357 2 2 2
mir-374 3 2 1
mir-450 3 1 1
  1. * part of the human mir-134 cluster experimentally investigated in [33]. In the same study it is reported that mir-144 and mir-224 are also parts of clusters with additional microRNAs that do not have orthologs in the MR 6.0.