BNL STEM example:   Earthworm Hemoglobin Negatively Stained.

Earthworm hemoglobin molecules dried in uranyl acetate negative stain is shown at a higher magnification. Strikingly more structural detail is now visible. The six-fold symmetry is clearly apparent in the end-views and much more structure can be seen in the side views. The full-scale of this micrograph is 0.256 microns.