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(A) Monte-Carlo simulations of ancHTenv16MYA evolution for 13.45–19.68 MY using a human neutral substitution rate. The percentage of 10,000 simulated sequences of each type is plotted with error bars indicating maximum and minimum estimates. (B) Distribution of stop codons (colored circles) in the Gag, Pol and Env coding sequence of proviruses orthologous to the HERV-T provirus containing hsaHTenv.
