CELL WALL: The orange layer is peptidoglycan which lies just exterior to the plasma membrane (blue).
S-LAYER: The bacterium may be covered by a regular arrangement of proteins called an S-layer; ref: Journal of Bacteriology, Jan 1998, p. 52-58. In this diagram, the proteins are shown as an array of silvery spheres lying on top of the peptidoglycan layer.
CAPSULE: The capsule (yellow) is made from poly-D-glutamic acid (whereas most bacterial capsules are made from polysaccharides). Capsules are required to make the anthrax bacteria virulent.
GENOME: The genetic material is a skein of circular DNA localised as the nucleoid. The nucleoid lacks a nuclear membrane (a defining characteristic of prokaryotic cells). Peeping out from the upper right part of the nucleoid is a plasmid - a separate piece of DNA.
CYTOPLASM: The bacterial cytoplasm is shown filled with ribosomes. These are somewhat smaller than their eukaryotic counterparts and many are shown linked into polysomes.LINKS ON ANTHRAX: