Fig. 2. Immunolocalization of fibrillarin and specific DNA staining in nucleoli of Allium sativum cells. The gold particles are restricted to nucleoli. Gold particles are mainly distributed over the DNA fibers. Some gold particles are also present outside of the DNA fibers (arrows), but the regions with low electronic density (asterisks) are devoid of labeling. Nu, nucleolus Bar, 0.5 µm.