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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Curr Opin Genet Dev. 2018 Mar 2;49:15–24. doi: 10.1016/j.gde.2018.02.007

Figure 1. Numbers of horizontal transfers of transposable elements and vertebrate endogenous retroviruses.

Figure 1.

The barplots show the numbers of HTT events per TE superfamily (A) and per TE class (B) as taken from HTT-db in October 2017 (Dotto et al. 2015). The barplot in C) shows the number of clusters of related ERV sequences for each ERV family unearthed from 65 vertebrate genomes by Hayward et al. (2015). The presence of >3000 ERV lineages in vertebrates, each inferred to descend from a discrete endogenisation event [96], suggests that this form of HTT has been pervasive during vertebrate evolution.