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Fig. 1 | Microbiome

Fig. 1

From: Expanding magnetic organelle biogenesis in the domain Bacteria

Fig. 1

The magnetosome in which magnetotactic bacteria (MTB) biomineralize magnetic crystals is a typical example of a bacterial organelle. a Membrane-bounded magnetosomes contain intracellular magnetic nanoparticles (Fe3O4 or Fe3S4), with typical ~ 20–150 nm sizes. Magnetic particles within MTB magnetosomes are typically organized into (a) chain-like structure(s) within the cell in order to optimize the cellular magnetic dipole moment. Functions of magnetosomes include magnetoreception [15, 16] and ROS detoxification [17, 18], both of which have been experimentally proven. Additional proposed functions, such as iron storage and sequestration, acting as an electrochemical battery or a gravity sensor, need further testing. b Representative electron micrographs of MTB cells collected in this study. The black arrows indicate magnetosome chains

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