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.
A graph of synonymous distances between duplicated sequences and between interspecific sequences. Shaded boxes represent the standard deviation of distance estimates. The time scale is based on an assumed rate of synonymous nucleotide substitution (see text).
