LSm protein Hfq hexamer torus (search wikipedia for their image below ). This is going to be an awesome hunt, especially in the hepatocyte nuclei in the 14CoS ko mice where the hepatocytes undergo a pan-apoptosis, synchronized across the entire liver.  There will be (I predict) many cases where this group of proteins will cause clearly visible electron microscopic ultrastructure in that process. The ultrastructure of the nucleus is determined by the status of ribosomes production.