Skip to main content
. 2021 Sep 16;13(9):1846. doi: 10.3390/v13091846

Figure 1.

Figure 1

(A). Phylogenetic tree derived from the E7 protein sequences of human Alphapapillomaviruses. High-risk viruses are shown in red/orange and low-risk viruses in green/blue. Viral species are shown on the perimeter of the tree. Those viruses that have been found to be frequently integrated are indicated with an asterisk * (Viral Integration site database. https://bioinfo.uth.edu/VISDB ; accessed on 10 August 2021). (B). Map of the HPV16 genome. Early genes are shown in cyan and late genes in green. The Upstream Regulatory Region, URR, is shown in purple. Also indicated are the early and late viral promoters, PE and PL, and the early and late polyadenylation signals, pAE and pAL.