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. 2022 Nov 25;12(23):4187. doi: 10.3390/nano12234187

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Transmission electron microscope (TEM) images of magnetosomes and the magnetosome membrane. (A) TEM micrograph of a cell of Magnetospirillum magneticum strain AMB-1 deposited onto a Formvar-coated electron microscope grid showing a chain of cuboctahedral magnetosomes. (B) TEM micrograph of an ultrathin section of a cell of “Ca. Magnetoovum mohavensis” showing the magnetosome membrane (arrow) surrounding bullet-shaped magnetite crystals. (C) TEM micrograph of an extracted and purified magnetosome chain from a Magnetococcus marinus MC-1 cell showing prismatic magnetite crystals surrounded by the magnetosome membrane (arrow). (D) Scheme of the hypothesized mechanism of magnetite biomineralization. (E) Model for magnetite biomineralization in Magnetospirillum species [70,71]. Reprinted/adapted with permission from Refs. [70,71]. 2022, Elsevier B.V.