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.
Simplified phylogeny of metazoans (A) and chordates (B) showing the organisms where NR genes were found. In A, the subfamilies are indicated for each sequence. For B the number of different sequences found for a given group (e.g., PPAR) is indicated in parentheses. Zoological groups are boxed, previously described receptors from the literature are in bold, and receptors identified in this study are italicized.
