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Table 3 Estimation of time since integration

From: Identification of diverse full-length endogenous betaretroviruses in megabats and microbats

  Divergencea Age (mya)b
P. vampyrus   
 PvERV-βA 0.024 30
 PvERV-βB 0.011 13.8
 PvERV-βC 0.027 33.8
 PvERV-βD 0.056 ND
 PvERV-βE 0.011 13.8
 PvERV-βF 0.043 ND
 PvERV-βG 0.039 ND
 PvERV-βH 0.006 7.5
 PvERV-βI 0.029 36.3
 PvERV-βJ 0.005 6.3
 PvERV-βK 0.025 ND
M. lucifugus   
 MlERV-βA 0.055 29
 MlERV-βB 0.043 22.6
 MlERV-βC 0.008 4.2
 MlERV-βD 0.012 6.3
 MlERV-βE 0.007 3.7
 MlERV-βF 0.006 3.2
  1. a 5′ and 3′ LTR divergence: number of differences, per nucleotide, per site.
  2. b Molecular clock dating was used to estimate the time in millions of years (mya) since the integration of each betaretrovirus into the host genome, based on the number of nucleotide differences between the 5′ and 3′ LTRs of each betaretrovirus [25].
  3. ND: Not dated; these βERVs could not be dated using this method. PvERV-βD and PvERV-βF contained non-sequenced regions within their 5′ LTR, while PvERV-βG and PvERV-βK contained bulk deletions within their 3′ LTRs.