Chemistry Reference
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Figure 2.
Transmission electron micrographs of magnetite magnetosomes in chains within cells of various
magnetotactic bacteria. (a) Equidimensional cubo-octahedral crystals in
Magnetospirillum
magnetotacticum
, small arrows denote twinned crystals and large arrows indicate smaller
superparamagnetic crystals. (b-d) Elongated crystals with quasi-rectangular projected shapes: (b) two
chains of crystals from the marine vibrio strain MV-1; (c) chain of crystals from the marine spirillum strain
MV-4 with arrows denoting twinned crystals; (d) high magnification electron micrograph of crystals from
the marine coccus strain MC-1, crystals are part of the chain shown in the inset.
Figure 3
. Transmission electron micrograph of an unstained, uncultured magnetotactic bacterium (a)
collected from the oxic-anoxic transition zone of the Pettaquamscutt Estuary, RI and a high magnification
electron micrograph (b) of the multiple chains of bullet-shaped anisotropic magnetite crystals within the
cell. (Figure adapted from Devouard et al. 1998).
