Ok, I don't mean at all to suggest that there is only one 'right' pose or representation. Different orientations and levels of detail would emphasise different

Ok, I don't mean at all to suggest that there is only one 'right' pose or representation. Different orientations and levels of detail would emphasise different things. For example, it's quite nice that the haemoglobin one is down the central axis of the tetramer, and shows all the haem groups. I would expect almost any image that wanted to show the most parts of that structure to use a similar pose. I had not realised when I asked the question that the poses were picked in code, which is similar to how PDBsum does it (pretty sure Roman Laskowski told me it did, but I would have to check). Something like maximising the number of atoms in the plane of the screen. Of course, when it comes to YFP (your favourite protein), individual researchers are likely going to focus on different parts. My interest was always in the topology, so I would want to see all the helices and sheets, but someone else might want to see the active site front and center. Incidentally, I've heard the term 'molecular porn' used for fancy/shiny looking diagrams - not sure if it applies to these as well :)