C. buderi C. glycolicum C. gracile C. minus C. minutissimum C. okenii C. purpuratum C. salexigens C. tepidum C. vinosum C. violascens C. armingii C. weisii Chromatium is a genus of photoautotrophic Gram-negative bacteria which are found in water.

[1] The cells are straight rod-shaped or slightly curved.

They belong to the purple sulfur bacteria and oxidize sulfide to produce sulfur which is deposited in intracellular granules of the cytoplasm.

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