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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Variability: Analysis01:11

Variability: Analysis

Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...
Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
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Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...

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Updated: May 17, 2026

Detection of Rare Genomic Variants from Pooled Sequencing Using SPLINTER
14:06

Detection of Rare Genomic Variants from Pooled Sequencing Using SPLINTER

Published on: June 23, 2012

CooVar: co-occurring variant analyzer.

Ismael A Vergara1, Christian Frech, Nansheng Chen

  • 1Department of Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, B,C,, V5A 1S6, Canada.

BMC Research Notes
|November 3, 2012
PubMed
Summary
This summary is machine-generated.

CooVar is a new tool that analyzes genomic variations (GV) on protein-coding transcripts. It considers multiple variants together for more accurate biological annotations, improving variant significance identification.

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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
07:15

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation

Published on: January 16, 2019

Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Identifying functional genomic variations (GV) requires evaluating their impact on protein-coding transcripts.
  • Existing variant annotation tools often rely on external databases or analyze variants independently, leading to limitations in scope and accuracy.

Purpose of the Study:

  • To develop a novel, database-independent program for assessing the impact of genomic variations on protein-coding transcripts.
  • To improve the accuracy and completeness of variant annotations by considering the combined effects of multiple variants on the same transcript.

Main Methods:

  • Developed CooVar (Co-occurring Variant Analyzer), a command-line tool.
  • Input includes genomic variations (GV), reference genome sequence, and protein-coding exons.
  • Supports standard file formats: VCF, GFF/GTF, and GVF for pipeline integration.

Main Results:

  • CooVar annotates genomic variations and transcripts, considering the combined impact of co-occurring variants.
  • Demonstrated biologically accurate annotations through extensive testing on human and worm datasets.
  • Achieved correct annotations in a short processing time.

Conclusions:

  • CooVar is a user-friendly, lightweight variant annotation tool.
  • It provides enhanced accuracy by analyzing the combined impact of genomic variations on transcripts.
  • The tool is freely available for research use.