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Table 1 Classification of miRNAs in the Genome of Different Species

From: A potential role for intragenic miRNAs on their hosts' interactome

Organism

Intragenic miRNAs

Intergenic miRNAs

Intragenic miRNAs

 

Intronic

Exonic

 

miRNAs on Host Gene Strand

miRNAs on Opposite Host Strand

Homo sapiens

296 (42.6%)

37 (5.3%)

362 (52.1%)

282 (84.7%)

51 (15.3%)

Mus musculus

171 (35.4%)

30 (6.2%)

282 (58.4%)

163 (78.2%)

38 (21.8%)

Canis familiaris

3 (1.5%)

0 (0%)

201 (98.5%)

2 (66.7%)

1 (33.3%)

Gallus gallus

50 (10.7%)

1 (0.2%)

418 (89.1%)

46 (90.2%)

5 (9.8%)

Danio rerio

48 (15.0%)

1 (0.3%)

271 (84.7%)

39 (79.6%)

10 (20.4%)

Drosophila melanogaster

65 (42.8%)

2 (1.3%)

85 (55.9%)

53 (79.1%)

14 (20.9%)

Caenorhabditis elegans

51 (33.1%)

1 (0.6%)

102 (66.2%)

33 (63.6%)

19 (36.5%)

  1. Intragenic miRNAs are found in many different species. However, the distribution of intra- and intergenic miRNAs differs. These numbers are obtained by crossing miRNA genomic coordinates with known transcript coordinates (based on RefSeq sequences).