Summary
An auto-antibody from human serum of patients with the autoimmune disease scleroderma was used to localize the nucleolus in meristematic cells of onion and soybean roots using indirect immunofluorescence microscopy. Similar lots of antiserum recognized a single 34 kD, nucleolar protein, fibrillarin, in a variety of animal cells (Ochs, et al. 1984, 1985). In both plants, antibody linked fluorescence is associated with the one to several nucleoli present in the interphase nucleus. The fluorescence becomes diffuse around condensing prophase chromosomes and becomes more diffused at metaphase with slightly more intense fluorescence surrounding the chromosomes. At anaphase-telophase the fluorescence is localized in dense areas within the chromosomes, presumably representing prenucleolar bodies which will form the interphase nucleoli of the daughter nuclei. This antiserum provides a new, valuable tool for the study of the nucleolus and the highly conversed nucleolar antigen(s) that it recognizes.
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Vaughan, M.A. An autoimmune antibody from scleroderma patients recognizes a component of the plant cell nucleolus. Histochemistry 86, 533–535 (1987). https://doi.org/10.1007/BF00500629
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DOI: https://doi.org/10.1007/BF00500629