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Related Concept Videos

RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
RNA Interference01:23

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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RNA Interference01:23

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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Updated: Jun 6, 2026

An Experimental and Bioinformatics Protocol for RNA-seq Analyses of Photoperiodic Diapause in the Asian Tiger Mosquito, Aedes albopictus
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Why does insect RNA look degraded?

Eva C Winnebeck1, Craig D Millar, Guy R Warman

  • 1Department of Anaesthesiology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand. e.winnebeck@auckland.ac.nz

Journal of Insect Science (Online)
|November 12, 2010
PubMed
Summary
This summary is machine-generated.

Insect ribonucleic acid (RNA) integrity assessment using gel electrophoresis reveals a unique ribosomal RNA (rRNA) profile. This profile, exemplified by the honey bee, arises from an endogenous 28S rRNA break, not degradation.

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Area of Science:

  • Molecular Biology
  • Entomology
  • Biochemistry

Background:

  • Ribonucleic acid (RNA) integrity is crucial for accurate molecular analyses.
  • Gel electrophoresis and ribosomal RNA (rRNA) band analysis are standard methods for assessing RNA integrity.
  • Insect rRNA profiles often deviate from typical eukaryotic benchmarks.

Purpose of the Study:

  • To explain the electrophoretic rRNA profile specific to insects.
  • To clarify the nature of the 28S rRNA "hidden break" in insects.
  • To prevent misinterpretation of insect rRNA profiles as degradation.

Main Methods:

  • Gel electrophoresis of extracted RNA.
  • Analysis of ribosomal RNA (rRNA) band patterns.
  • Utilizing the honey bee (Apis mellifera) as a model organism.

Main Results:

  • Insect rRNA exhibits a distinct electrophoretic profile compared to standard benchmarks.
  • The 28S rRNA in most insects contains an endogenous "hidden break."
  • Denaturation disrupts hydrogen bonds, yielding two fragments that co-migrate with 18S rRNA.

Conclusions:

  • The observed insect rRNA profile is an accurate reflection of its endogenous composition.
  • Insect rRNA profiles should not be mistaken for signs of RNA degradation.
  • Understanding this unique profile is essential for accurate RNA analysis in insects.