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Related Concept Videos

RNA Structure01:19

RNA Structure

The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
RNA Structure01:23

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
RNA Structure01:23

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
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...
Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...

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Related Experiment Video

Updated: Jun 23, 2026

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Stacks in canonical RNA pseudoknot structures.

Hillary S W Han1, Christian M Reidys

  • 1Center for Combinatorics, LPMC-TJKLC, Nankai University, Tianjin 300071, PR China.

Mathematical Biosciences
|April 30, 2009
PubMed
Summary
This summary is machine-generated.

This study analyzes RNA pseudoknot structures, specifically their stack/loop distributions. We found a central limit theorem for stack numbers, aiding in understanding minimum-free energy structures.

Related Experiment Videos

Last Updated: Jun 23, 2026

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Area of Science:

  • Computational Biology
  • Bioinformatics
  • RNA Structure Analysis

Background:

  • RNA pseudoknots are crucial for biological functions.
  • Understanding the structural properties of RNA pseudoknots is essential.
  • Existing models focus on k-non-crossing and tau-canonical RNA structures.

Purpose of the Study:

  • To investigate the distribution of stacks/loops in k-non-crossing, tau-canonical RNA pseudoknot structures.
  • To derive and analyze the bivariate generating function for these structures.
  • To establish a central limit theorem for the distribution of stack numbers in RNA pseudoknots.

Main Methods:

  • Derivation of the bivariate generating function T(k, tau)(x, u) for k,tau-structures.
  • Analysis of the singularities of the generating function.
  • Parametrization of the variable u to identify dominant singularities.

Main Results:

  • The bivariate generating function T(k, tau)(x, u) was derived.
  • A unique, dominant singularity was identified for T(k, tau)(x, u) under specific parametrization.
  • A central limit theorem for the distribution of stack numbers was established.

Conclusions:

  • The study provides insights into the statistical properties of RNA pseudoknot structures.
  • Results are important for understanding minimum-free energy RNA pseudoknot structures generated by folding algorithms.
  • This work contributes to the theoretical understanding of RNA structural diversity.