Figure 2.

Comparison of fusion peptide mutations in yellow fever virus with other pathogenic flaviviruses. ^aThe mosquito-borne sequence is shown. In tick-borne viruses G is replaced by H as the 7^th amino acid. In Powassan, a tick-borne virus, the 10^th amino acid is F in lieu of L. Amino acids 15 and 16 are SL, GI, SL and GV in DENV1–4, respectively instead of SI.