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 relationship of collagen proteins in six mammals. Line with different colors indicates different groups. Circle of different color also indicates different groups. Buffalo: bbu; Cattle: bta; Goat: chi; Sheep: oar; Horse: eca; Human: has.
