nucleolar organizer region

nucleolar organizer region
Abbreviation: NOR
A chromosomal segment containing a large array of genes that encode ribosomal RNA; located at the secondary constriction of specific chromosomes.

Glossary of Biotechnology for Food and Agriculture . 2015.

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  • nucleolar organizer — Abbreviation: NO See: nucleolar organizer region …   Glossary of Biotechnology

  • nucleolar organizer — n NUCLEOLUS ORGANIZER * * * nucleolus organizer nucleolar organizing region …   Medical dictionary

  • Nucleolus organizer region — The nucleolus organizer region (NOR) or nucleolar organizer is a chromosomal region around which the nucleolus forms. This region is the particular part of a chromosome that is associated with a nucleolus after the nucleus divides. The region… …   Wikipedia

  • nucleolar organizing region — (NOR), nucleolus organizing region a chromosomal region, morphologically distinguishable as a secondary constriction, that encodes ribosomal RNA; it is surrounded by a fibrillar center of a nucleolus. In humans there are five, located on the… …   Medical dictionary

  • nucleolar organizer — Chromosome region that is active in nucleolus formation …   Dictionary of invertebrate zoology

  • Región organizadora nucleolar — La región organizadora nucleolar (o NOR, del inglés: nucleolar organizer region) es el sitio cromosómico donde se localizan los clusters de genes ribosómicos que codifican para el ARN ribosómico y que está asociado a una constricción secundaria.… …   Wikipedia Español

  • organizer — 1. Originally applied to a group of cells on the dorsal lip of the blastopore, which induce differentiation of cells in the embryo and control growth and development of adjacent parts. 2. Any group of cells having such a controlling influence,… …   Medical dictionary

  • NOR — Neurologic Outcome Research; noradrenaline; normal; nortriptyline; nucleolar organizer region * * * nucleolar organizing region …   Medical dictionary

  • безъядрышковая мутация — anucleolate mutation безъядрышковая мутация. Mутация, при которой в геноме отсутствуют районы ядрышкового организатора <nucleolar organizer region> и, соответственно, подавлен синтез рибосомной РНК; Б.м. известны у дрозофил и шпорцевых… …   Молекулярная биология и генетика. Толковый словарь.

  • растянутая ДНК — extended DNA растянутая ДНК. Участок ДНК, лишенный нуклеосомной структуры и характеризующийся толщиной фибриллярного материала не более 4 8 нм; Р.ДНК свойственна району ядрышкового организатора <nucleolar organizer region> (видимо,… …   Молекулярная биология и генетика. Толковый словарь.

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