Magnetotactic bacterium

Mann, S. Sparks, N.H.C. Couling, S.B. Lar-combe, M.C. Frankel, R.B. (1989) Crystallo-chemical characterization of magnetic spinels prepared from aqueous solution. J. Chem. Soc. Faraday Trans. I. 85 3033-3044 Mann, S. Sparks, N.H.C. Frankel, R.B. Bazy-linski, D.A. Jannasch, H.W. (1990) Biomineralization of ferrimagnetic greigite (FejS4) and iron pyrite (FeS2) in a magnetotactic bacterium. Nature 343 258—261... 

Figure 32.38. Magnetotactic Bacterium. The magnetosome, visible as a chain of opaque membrane-bound magnetite crystals, acts as a compass to orient the bacteria with the earth s magnetic field. The bacterium is artificially colored. [Courtesy of Richard B. Frankel, California Polytechnic State University, San Luis Obispo, California.]...

Mann S., et al. (1990) Biomineralization of ferrimagneic griegite and iron pyrite (FeS2) in a magnetotactic bacterium. Nature 343, 258—260. 

Yamazaki Takehiro, Oyanagi H, Fujiwara T, Fukumori Y (1995) Nitrite reductase from the magnetotactic bacterium Magnetospirillum magnetotacticum. A novel cytochrome cdt with Fe(II) nitrite oxidoreductase activity. Eur 1 Biochem 233 665-671 Yamazaki Takeshi, Fukumori Y, Yamanaka T (1985) Cytochrome at of Nitrosomonas europaea resembles aa3-type cytochrome c oxidase in many respects. Biochim Biophys Acta 810 174-183... 

Fig. 4.6. Thin section out from a magnetotactic bacterium showing magnetite (Fe304) crystals enclosed within intracellular vesicles (x 152,000)...

FIGURE 1 Magnetic particles from a magnetotactic bacterium, showing chain formation. [Courtesy of Prof. S. Seraphin, University of Arizona.]... 

Figure 4.22 Schematic presentation of a magnetotactic bacterium Aquaspiril-lum magnetotacticum) where the magnetosomes can be seen as black beads [119]...

Magnetotactic soil bacterium containing 36 magnetite-containing magnetosomes. Courtesy of Dennis Bazylinski. 

Magnetic Dipole Moments Chain formation and anisotropy of magnetic NPs have been well known in nature for a long time. For instance, an anisotropic chain-like structure of maghemite NPs has been observed in terrestrial magnetotactic bacteria as shown in Fig. 1. These chain stractures within the bacterium. 

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