They therefore represent the interphase counterpart of metaphase
nucleolar organizer regions (NOR's)
Nucleolar organizer competition in Aegilops--rye hybrids.
Pendulum (Moscone et al., 2007; Scaldaferro et al., 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.
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.9 AgNOR numbers rise with the proliferative activity of the cell, AgNOR are used to diagnose histopathological aspects of various benign and malignant lesions.10
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.
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.
This condition, associated with the occurrence of two GC-rich regions, coincident with
nucleolar organizer regions, suggests lower participation of Robertsonian translocation events, frequent in several species [15, 19, 38-40].