【正文】
rastructures after specific staining, showing the variation in thickness of rDNA fibers (A). The distribution of AgNOR protein in the nucleolus. (A) AgNOR proteins are mainly distributed in the interior of the nucleolus and present as circular configurations with hollow centers. The similarity between rDNA and AgNOR arrangement configurations. A is one of the arrangements of rDNA. B is the circular distribution configuration of Ag NOR protein.. The nucleolus labeled with the RNA/DNA hybrid antibody. The signals of colloid gold particles for transcription sites are locatedat the periphery of FC and DFC regions near the FC (asterisks). A model of the nucleolar ultrastructure.