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Что (кто) такое nucleolar$53964$ - определение

A REGION OF A CHROMOSOME WHERE NUCLEOLI FORM DURING INTERPHASE, AND WHERE GENES ENCODING THE LARGEST RRNA PRECURSOR TRANSCRIPT ARE TANDEMLY ARRAYED.

Nucleolar organizer; Nucleolar organizer region; Nucleolar Organizing Regions; Nucleolar Organizing Region; Nucleolar Organization Region; Nucleolar organization region; Nucleolar organizer regions; Nucleolar organizing regions; Nucleolar organizing region

Nucleolus organizer region

Nucleolus organizer regions (NORs) are chromosomal regions crucial for the formation of the nucleolus. In humans, the NORs are located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22, the genes RNR1, RNR2, RNR3, RNR4, and RNR5 respectively.

https://en.wikipedia.org/wiki/Nucleolus_organizer_region

Small nucleolar RNA-derived microRNA

Small nucleolar RNA derived microRNA

In molecular biology, small nucleolar RNA derived microRNAs are microRNAs (miRNA) derived from small nucleolar RNA (snoRNA). MicroRNAs are usually derived from precursors known as pre-miRNAs, these pre-miRNAs are recognised and cleaved from a pri-miRNA precursor by the Pasha and Drosha proteins.

https://en.wikipedia.org/wiki/Small_nucleolar_RNA-derived_microRNA

Small nucleolar RNA

CLASS OF SMALL RNA MOLECULES THAT GUIDE CHEMICAL MODIFICATIONS OF OTHER RNAS

SnoRNP; SnoRNAs; SnoRNA; SnoRNA prediction software; C/D box

In molecular biology, Small nucleolar RNAs (snoRNAs) are a class of small RNA molecules that primarily guide chemical modifications of other RNAs, mainly ribosomal RNAs, transfer RNAs and small nuclear RNAs. There are two main classes of snoRNA, the C/D box snoRNAs, which are associated with methylation, and the H/ACA box snoRNAs, which are associated with pseudouridylation.

https://en.wikipedia.org/wiki/Small_nucleolar_RNA

Википедия

Nucleolus organizer region

Nucleolus organizer regions (NORs) are chromosomal regions crucial for the formation of the nucleolus. In humans, the NORs are located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22, the genes RNR1, RNR2, RNR3, RNR4, and RNR5 respectively. These regions code for 5.8S, 18S, and 28S ribosomal RNA. The NORs are "sandwiched" between the repetitive, heterochromatic DNA sequences of the centromeres and telomeres. The exact sequence of these regions is not included in the human reference genome as of 2016 or the GRCh38.p10 released January 6, 2017. On 28 February 2019, GRCh38.p13 was released, which added the NOR sequences for the short arms of chromosomes 13, 14, 15, 21, and 22. However, it is known that NORs contain tandem copies of ribosomal DNA (rDNA) genes. Some sequences of flanking sequences proximal and distal to NORs have been reported. The NORs of a loris have been reported to be highly variable. There are also DNA sequences related to rDNA that are on other chromosomes and may be involved in nucleoli formation.

https://en.wikipedia.org/wiki/Nucleolus organizer region