The evolution of <a href="https://en.wikipedia.org/wiki/Aryl_hydrocarbon_receptor" class="extiw" title="en:Aryl hydrocarbon receptor">en:Aryl hydrocarbon receptor</a> (AhR) according to Mark E. Hahn: <i>Aryl hydrocarbon receptors: diversity and evolution.</i> Chemico-Biological Interactions, 2002, 141:131–160.
<a href="//commons.wikimedia.org/wiki/User:Samulili" title="User:Samulili">Samuli Lintula</a>
<span class="int-own-work" lang="en">Own work</span>