FIG. 3.
Transmission electron micrographs of magnetotactic bacteria grown in the presence of tellurite. (A) Magnetotactic bacteria grown (i) in the presence of tellurite (40 μM) and (ii) in its absence. The scale bar indicates 100 nm. (B) Ultrathin-sectioned micrograph of magnetotactic bacteria grown in the presence of tellurite. The image on the right is a magnification of the square area from the left image. Black and white arrows indicate magnetite and tellurium, respectively. The scale bar indicates 100 nm.