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Buy Wholesale and maintain an Active status for 2 months and we will refund your $39 Distributor Fee
20-September-2008 09:29:09 - Piwi-interacting RNA Piwi-interacting RNA piRNA is a class of small RNA molecules that is expressed in mammalian testes and somatic cells and forms RNA-protein complexes with Piwi proteins. These piRNA complexes piRCs have been linked to transcriptional gene silencing of retrotransposons and other genetic elements in germ line cells, particularly those in spermatogenesis. Purification of these complexes has revealed that these oligonucleotides are approximately 29-30 nucleotides long. They are distinct in size from miRNA and are associated with distinct protein complexes. It remains unclear how piRNAs are generated, but their biogenesis pathway is distinct from miRNA and siRNA. RNA silencing piRNA has a role in RNA silencing via the formation of an RNA-induced silencing complex RISC. The Piwi proteins are part of a family of proteins called the argonautes, which are active in the testes of mammals and are required for germ-cell and stem-cell development in invertebrates. piRNAs are short stretches of RNAs with a typical length of 26-31 nucleotides, making them a distinct entity from microRNAs miRNAs and short interfering RNAs siRNAs which are 21-23 nucleotides long. Three Piwi subfamily proteins - MIWI, MIWI2 and MILI - have been found to be essential for spermatogenesis in mice. References N.C. Lau et al., Characterization of the piRNA Complex from Rat Testes, Science 313, 363 2006 V.N. Kim, Small RNAs Just Got Bigger: Piwi-Interacting RNAs piRNAs in Mammalian Testes, Genes Dev. 20, 1993 2006 A. Girard et al., A Germline-Specific Class of Small RNAs Binds Mammalian Piwi Proteins, Nature 442, 199 2006 A. Aravin et al., A Novel Class of Small RNAs Bind to MILI Protein in Mouse Testes, Nature 442, 203 2006 S.T. Grivna et al., A Novel Class of Small RNAs in Mouse Spermatogenic Cells, Genes Dev. 20, 1709 2006 T. Watanabe et al., Identification and characterization of two novel classes of small RNAs in the mouse germline, Genes Dev. 20, 1732 2007 M.A. Carmell et al., MIWI2 Is Essential for Spermatogenesis and Repression of Transposons in the Mouse Male Germline, Dev Cell. 12, 503 2007 This cell biology article is a stub. v d e Natural antisense transcripts Antisense RNA · Cis-natural antisense transcript · Large non-coding RNA · MicroRNA · Small interfering RNA · Small temporal RNA · Trans-acting siRNA v d e Types of nucleic acids Constituents Nucleobases | Nucleosides | Nucleotides | Deoxynucleotides Ribonucleic acids RNA | mRNA pre-mRNA/hnRNA | tRNA | rRNA | aRNA | gRNA | miRNA | ncRNA | piRNA | shRNA | siRNA | snRNA | snoRNA | stRNA | ta-siRNA | tmRNA Deoxyribonucleic acids DNA | cDNA | gDNA | msDNA | mtDNA Nucleic acid analogues GNA | LNA | PNA | TNA | morpholino Cloning vectors phagemid | plasmid | lambda phage | cosmid | P1 phage | fosmid | BAC | YAC | HAC Major families of biochemicals Saccharides | Carbohydrates | Glycosides | | Amino acids | Peptides | Proteins | Glycoproteins | | Lipids | Terpenes | Steroids | Carotenoids Alkaloids | Nucleobases | Nucleic acids | | Enzyme cofactors | Flavonoids | Polyketides | Tetrapyrroles Retrieved from http://en..org/wiki/Piwi-interacting_RNA Categories: Cell biology stubs | RNA Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages Deutsch Italiano 中文 This page was last modified on 24 July 2008, at 21:3
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So many of us do not eat a balanced diet, get enough sleep, have too much stress, or are impacted with toxins and pollutants. Drinking 2 ounces of MonaVie twice a day will help your body detoxify as well as build your immune system. Its the smartest thing you can do for yourself, so start today. Buying MonaVie through our company guarantees you support 7 days a week and, if you would like to share MonaVie with your family and friends we will guide you from start to finish.
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