18S ribosomal RNA (abbreviated 18S rRNA) is a part of the ribosomal RNA in eukaryotes. It is a component of the Eukaryotic small ribosomal subunit (40S) and the cytosolic homologue of both the 12S rRNA in mitochondria and the 16S rRNA in plastids and prokaryotes .

18S核糖体RNA（英語： 18S ribosomal RNA ，简称18S rRNA），是真核生物的核糖体中核糖体小亚基（40S亚基）的组成部分。 18S rRNA在真核生物中非常保守，与原核生物核糖体小亚基的 16S rRNA 同源。

2023年9月22日 · 内转录间隔区 （Internal transcribed spacer，ITS）是染色体上SSU rRNA与LSU rRNA之间的一段间隔区。在真核生物中有两类ITS：ITS1和ITS2，ITS1位于18S和5.8S之间，ITS2位于5.8S和28S之间。

18s rrna除了比16s rrna稍长且多一些臂和环结构外，两者空间结构十分相似，在核糖体中起到的作用也基本相同。 所以就酵母而言，鉴定酵母菌株本身是需要进行18s鉴定，之所以酵母中同时出现了真核和原核的rRNA沉降系数，可能是因为该株酵母中含有共生体（线粒 ...

与 细菌多样性分析类似，在真核微生物中也有三类核糖体rna（rrna），包括5.8s rrna、18s rrna和28s rrna。 18s rrna基因是编码真核生物核糖体小亚基的dna序列，其中既有保守区，也有可变区（v1-v9，没有v6区）。保…

2025年2月20日 · 18S nonfunctional rRNA decay (NRD) detects and eliminates translationally nonfunctional 18S rRNA. Although this process is critical for ribosome quality control, the mechanisms underlying nonfunctional 18S rRNA turnover remain elusive, particularly in …

18S Ribosomal RNA is a structural RNA that is a fundamental component of all eukaryotic cells. It is a part of ribosomal RNA and serves as the small subunit of eukaryotic cytoplasmic ribosomes. It is frequently used in phylogenetic studies to analyze genetic diversity and …

2014年3月3日 · Eukaryotic 18S ribosomal RNA (rRNA) gene primers that feature a wide coverage are critical in detecting the composition of eukaryotic microscopic organisms in ecosystems. Here, we predicted 18S rRNA primers based on consecutive conserved sites and evaluated their coverage efficiency and scope of application to different eukaryotic groups.

The tertiary structure as well as the secondary structure of 18S rRNA can be more diverse than what was previously supposed. Besides revealing how this interesting gene evolves, it can help to remove ambiguity from the alignment of eukaryotic 18S rDNAs and to improve the performance of 18S rDNA in phylogenetic reconstruction.

2016年8月24日 · Toe-printing and mutational assays reveal that an interaction exists between a purine-rich sequence in h4 mRNA and a complementary UUUC sequence of helix h16.