nucleolar organizer


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Noun1.nucleolar organizer - the particular part of a chromosome that is associated with a nucleolus after nuclear division
anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"
chromosome - a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order; "humans have 22 chromosome pairs plus two sex chromosomes"
References in periodicals archive ?
Nucleolar organizer regions as diagnostic determinants for malignancy.
Different researchers have carried out different methods to assess the grading of the different types of ameloblastomas of which one of the methods which assess the proliferative activity of ameloblastoma are argyrophilic nucleolar organizer regin (AgNOR) which stains the proteins with silver stain which is associated with active nucleolar organizer regions (NOR|), these are DNA loops that transcribe to ribosomal RNA directs protein synthesis and ribosomal formation.
The objectives of this study were to compare the argyrophilic nucleolar organizer region (AgNOR) parameters and estrogen receptor status with grades of invasive ductal carcinoma of breast.
2016), an integrated physical map of constitutive heterochromatic regions (Het), ribosomal loci (rDNA) and nucleolar organizer regions (NORs) in a single accession of this variety is unavailable, that could help to correlate chromosomes with genetic linkage maps and the future whole-genome sequence of the species.
El nucleolo esta organizado en torno a segmentos de ADN especificos llamados regiones organizadoras nucleares (en ingles, NORs, nucleolar organizer regions).
Mesquita RA found higher numbers of Argyrophilic Nucleolar Organizer Regions (AgNORs) and proliferating cell nuclear antigen (PCNA)-positive cells in ossifying fibroma than in peripheral ossifying fibroma indicating higher proliferative activity in ossifying fibroma, X-ray diffraction analysis indicated that the mineral phase of both central and peripheral tissues consists of apatite crystals and that the crystallinity of these apatites is lower than that of bone apatite.
During mitosis RNA Pol I transcription ceases and rRNA genes specifically reside at the short arm of the acrocentric chromosomes to form a structure called Nucleolar Organizer Regions (NORs Fig.
According with Mariano & Delabie (2013) these complementary regions may indicate nucleolar organizer regions, as has already been observed in other ants, such as Tapinoma nigerrimum (Lorite et al.
Giemsa staining, nucleolar organizer region (NOR) banding, C-positive heterochromatin banding and DAPI fluorescence were used in N metaphases of a specimen collected in Asa Branca Farm, in Aurora do Tocantins municipality, Tocantins state, Brazil.
It was applied the conventional 2% Giemsa staining for 5 minutes to obtain chromosome measures and Ag-NOR banding according to Howell and Black (1980) for nucleolar organizer regions (NOR) localization and also for counting the nucleolus number in interphase cells.
Chromosomal localization and activity of nucleolar organizer regions in the dog (Canis familiaris).