Ref ID : 4501
A. Kuck and August Ruthmann; Conical Kinetochores with Single Microtubules in the Micronuclear Mitosis of the Ciliate Colpoda steinii. Z.Naturforsch. 38c:672-674, 1983
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During micronuclear metaphase, the decondensed chromosomes bear conical kinetochores connected by a single microtubule to the tapered ends of the spindle-shaped nucleus. Using Bernhard's procedure for the preferential staining of ribonucleo-protein-containing structures, the whole kinetochore cone retains its electron density. Chromosome separation at anaphase involves shortening of the kinetochore microtubule and elongation of the interpolar region.