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. 2009 Nov 10;239(1):49–56. doi: 10.1007/s00709-009-0081-4

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© The Author(s) 2009

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Fig. 2 — TEM micrographs showing ultrastructure of Micrasterias cells pretreated with CeCl₃ for H₂O₂ localization: a control, b KCl-treated cell, cerium perhydroxide deposits at the plasma membrane (arrows). EEL spectra of the Ce M_4,5 edge from the circled region in a and b: c control cell, d KCl-treated cell. CW cell wall, M mitochondrion. Bar = 1 µm