JCS -- Biggiogera et al. 114 (17): 3199 Figure IG1

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Fig. 1. Nucleolus of a mouse P815 cell. Glutaraldehyde-osmium fixation, Epon embedding, uranyl-lead staining. The DFC (arrows) appears as a strongly electron-dense structure surrounding the FCs. Most of the nucleolus is formed by the GC (asterisk). Bar, 0.5 µm.