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(A and B) SEM-SE stereo micrograph of area in Fig. 4A, showing surface features. (C) SEM-BSE image of magnetosome chain in freeze-dried culture of Magnetospirillum magnetotacticum. (D and E) SEM-BSE stereo micrograph of A and B. (F) Outlines of areas shown in G and H and J and K. (I and L) Chains visible in G and H and J and K, respectively, are highlighted. px, orthopyroxene; ca, carbonate.
