Chromatium

Chromatium
Scientific classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Gammaproteobacteria
Order: Chromatiales
Family: Chromatiaceae
Genus: Chromatium
Perty 1852
Type species
Chromatium okenii
Species

C. okenii
C. weisii
C. gracile

Chromatium is a genus of photoautotrophic Gram-negative bacteria, also known as purple sulfur bacteria, which are found in water. These bacteria oxidize sulfide to produce sulfur which is deposited in intracellular granules of the cytoplasm. They also couple oxidation of other metals, like iron, in addition to sulfur oxidation.