I scanned in this electron micrograph of an alveolar type II cell because there were some areas of dilated RER which I had hoped might have some patterning (layering) indicating it might be an organized surfactant protein (A) perhaps, as seen in other species. But my conclusion was that there was too little detectable substructure in those areas to indicate that it might be an RER surfactant protein granule.  Cat #3, 7268_24564 control group.