Diversity in CO-Concentrating Mechanisms among Chemolithoautotrophs from the Genera , , and , Ubiquitous in Sulfidic Habitats Worldwide.

Members of the genera , , and fix carbon at hydrothermal vents, coastal sediments, hypersaline lakes, and other sulfidic habitats. The genome sequences of these ubiquitous and prolific chemolithoautotrophs suggest a surprising diversity of mechanisms for the uptake and fixation of dissolved inorganic carbon (DIC); these mechanisms are verified here. Carboxysomes are apparent in the transmission electron micrographs of most of these organisms but are lacking in sp.