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. 2014 Jul 2;9(7):e101195. doi: 10.1371/journal.pone.0101195

Table 3. Age estimate of PtERV subfamilies.

Subfamily No. of LTRs aligned Average length (bp) Analyzed length (bp) Pairwise distances without INDEL Age (myrs)a
CERV1 80 409 345 0.037 8.32–10.82
PtERV1c 104 379 311 0.044 9.29–12.07
CERV2 2 544 532 0.009 1.70–2.21
PtERV2a 4 586 573 0.003 0.88–1.14
PtERV2b 2 491 474 0.004 0.80–1.04
PtERV2c 10 624 578 0.029 6.33–8.23
a

The age is calibrated by 0.26% [48] and 0.20% [49] per site per myr (see Methods).