All MTB contain magnetosomes, which are nanometer-sized, magnetic, mineral crystals enclosed in a membrane. In most cases the magnetosomes are arranged in a chain or chains, apparently fixed within the cell adjacent to the plasma membrane. In many MTB strains, the magnetosome crystals are magnetite, characterized by a narrow size distribution and uniform, species-specific, crystal habits. In MTB from marine, sulfidic environments, the magnetosome crystals are the iron-sulfide mineral greigite (Fe3S4), which is isostructural with magnetite and is also ferrimagnetically ordered at room temperature.
Related categories• MICROBIOLOGY
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