Polymorphism of E6 and E7 Genes in Human Papillomavirus Types 31 and 33 in Northeast China

Figure 3

(a) The neighbor-joining tree of HPV31E6. ∗represents the sequences obtained in this study. Others were the variants reported previously in NCBI. Numbers above the branches are the bootstrap values. (b) The neighbor-joining tree of HPV31E7.

(a)

(b)