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Table 2 Numbers and orthologs of ERV-W sequences identified by HERV17 BLAT searches in Catarrhini primate genome sequences

From: HERV-W group evolutionary history in non-human primates: characterization of ERV-W orthologs in Catarrhini and related ERV groups in Platyrrhini

  Chimpanzee Gorilla Orangutan Gibbon Rhesus
1) ERV-W loci with HERV-W orthologs in human genome 138 (67%) 132 (64%) 122 (60%) 111(58%) 69 (53%)
2) ERV-W loci corresponding to human solitary LTRs (n = 19) 1 (17) 1 (17) 7 (10) 10* (8) 14* (0)
3) ERV-W loci present in human as non-canonical HERV-W (like) 29 27 24 21 20
4) ERV-W loci lacking an ortholog in human 3 (3) 5 (4) 8 (6) 4 (2) 68 (66)
TOTAL 171 165 160 145 168
  1. 1) Number of ERV-W elements with an orthologous locus among the 211 HERV-W loci: respective percentages are given in parenthesis. Two HERV-W loci on human chromosome Y were excluded from the analysis (see text)
  2. 2) Numbers of ERV-W elements corresponding to a solitary LTR at the orthologous human position. Numbers in parenthesis indicate the proviral insertions acquired in evolutionarily older primate species that were likewise a solitary LTR in the non-human primates analyzed. “*” indicates species with initial formations of proviruses that recombined to solitary LTRs in subsequent primate species: Gibbon (5) and Rhesus (14)
  3. 3) Numbers of ERV-W elements with an ortholog in the human reference genome sequence, yet being less similar to HERV-W. Those sequences were not identified as HERV-W elements in a previous analysis [68]
  4. 4) ERV-W loci absent in the orthologous human genome positions. Numbers in parenthesis indicate the proportion of species-specific insertions