FIG. 1.

Pol NJ phylogeny of recently integrated hg16 proviruses (indicated by white boxes), PanTro1 proviruses (indicated by black circles), and reference retroviral sequences using the entire proteins or “puteins.” Shadows indicate the different groups discussed in the text. Abbreviations are spelled out in the last paragraph of Materials and Methods. Bootstrap supports for the corresponding NJ cladogram rooted on midpoint are presented in Fig. S1 in the supplemental material.