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.
GC3 is more heterogeneous between species than GC1 and GC2. GC content for first, second, and third codon positions and introns (GCi). Species were ordered from left to right by ascending GC3 content. See Additional file 1 for species names.
