Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic trees of genes 1, E, and M of IBVs. The trees were constructed using ME algorithms. Gene 1a (A): the 5′-UTR and full-length sequence of 1a (12,528 bp); 1b (B): nt 18,782–20,459 (1678 bp); the full-length envelope (306 bp) and membrane (678 bp) genes: E (C) and M (D), respectively. Bootstrap values greater than 60% are shown. The scale bar indicates the number of nucleotide replacements per site.
