A single isolated mitochondrion (blue)  and attached SER (pink) from a mouse at D28, likely isolated from liver,  postnatally having received NAC. This and other images were of controls for D28 mitochondrial pellets from hepatocyte specific GCLC ko mice also receiving NAC.  There is a lot of substructure going on at the attachment between the outer mitochondrial membrane and the SER membrane, and some tiny cristae right at that junctional tether. It is possible that a mitochondrial ribosome is in the field as well (dark dot rounded object in mitochodnrial matrix – middle right. (also there is a tiny piece of dirt, so dont be confused). So the periodicity between SER and mitochondrion seems to come out at about 35nm which is larger than I had hoped, but there is always the possibility that the structures were cut tangentially.