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Diagnostic ratio plots of the negative strand for ERV-1 (A) and ERV-L (B) families. Each point in this plot is a sequence belonging to ERV-1 (red circles in panel A), ERV-L (red circles in panel B), normal HIV-1 (green plus signs), HIV-1 hypermutated by hA3G (purple plus signs), HIV-1 hypermutated by hA3F (blue plus signs), and HERV-S71 of ERV-1 family (yellow circles in panel A). The black arrow in panel A points to LTR12B and LTR12D sequence cluster.
