The nucleolus
نویسندگان
چکیده
Are they always about? Not necessarily. They come and go, disappearing in mitosis from late prophase until telophase. During this period, some nucleolar antigens, including RNA polymerase I and topoisomerase I, remain associated with tandemly repeated clusters of ribosomal RNA genes on the condensed chromatin — these chromosomal regions are presumptuously known as nucleolar organising regions (NORs). But other nucleolar components are dispersed throughout the mitotic cytoplasm.
منابع مشابه
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عنوان ژورنال:
- Current Biology
دوره 10 شماره
صفحات -
تاریخ انتشار 2000