Fig. 2.
Illustration of center-rooted molecular trees. a Center of the longest path is a node. b Center of the longest path is an edge. The thick lines indicate one of the longest paths and the center node/edge is shown in red
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.