Stereoview of h-MC4R models in the active (gray) and inactive (cyan) conformations complexed with MTII (carbon, green; nitrogen, blue; oxygen, red) and SHU9119 (carbon, orange; nitrogen, blue; oxygen, red), respectively. The h-MC4R models are superimposed using the backbone heavy atoms of TM residues apart from TM6. Hydrogen atoms are not shown for clarity. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)