Figure 1
UCP1 immunostaining in cetartiodactyl cerebral cortex. Photomicrographs of Nissl stained (purple colored images) and UCP1-immunostained (brown colored images) cortical sections in a range of artiodactyl (two left columns) and cetacean species (two right columns). Note in all cases the presence of UCP1-immunostained cortical neurons, but in the artiodactyls these are limited to the lower layers of the cortex, while almost all cortical neurons from all layers are immunopositive in the cetaceans. Scale bar in the UCP1-immunostained section of Connochaetes taurinus equals 500 µm and applies to all artiodactyl images. Scale bar in the UCP1-immunostained section of Phocoena phocoena equals 100 µm and applies to both images. Scale bar in the UCP1-immunostained section of Balaenoptera acutorostrata equals 500 µm and applies to both images. Scale bar in the UCP1-immunostained stained section of Megaptera novaeangliae equals 250 µm and applies to both images.
