Ultrastructure

The ultrastructure of a single bacterial cell (Bacillus subtilis). The scale bar is 200 nm.

Ultrastructure (or ultra-structure) is the architecture of cells that is visible at higher magnifications than found on a standard optical light microscope. This traditionally meant the resolution and magnification range of a conventional transmission electron microscope (TEM) when viewing biological specimens such as cells, tissue, or organs. Ultrastructure can also be viewed with scanning electron microscopy and super-resolution microscopy, although TEM is a standard histology technique for viewing ultrastructure. Such cellular structures as organelles, which allow the cell to function properly within its specified environment, can be examined at the ultrastructural level.

Ultrastructure, along with molecular phylogeny, is a reliable phylogenetic way of classifying organisms.

External links

• Media related to Ultrastructure at Wikimedia Commons