Bacteria
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Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bact
Rod-shaped Bacillus subtilis
An electron micrograph of Halothiobacillus neapolitanus cells with carboxysomes inside, with arrows highlighting visible carboxysomes. Scale bars indicate 100 nm
The exterior of Pseudomonas, a genus of Gram-negative Bacteria.
Gram-negative bacteria
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Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. Their defining characteri
Microscopic image of gram-negative Pseudomonas aeruginosa bacteria (pink-red rods)