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Comparing Copy Number Variations and SNPs

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%...

Single Nucleotide Polymorphisms-SNPs

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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Visualizing SNVs to quantify allele-specific expression in single cells.

Marshall J Levesque¹, Paul Ginart, Yichen Wei

¹Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA. MCMartin@lbl.gov

|August 6, 2013

Summary

This summary is machine-generated.

We developed a new Fluorescence In Situ Hybridization (FISH) method to detect single-nucleotide variants (SNVs) in RNA. This technique efficiently quantifies gene expression and identifies parental chromosomes in individual cells.

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Single-cell Gene Expression Profiling Using FACS and qPCR with Internal Standards

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Published on: February 25, 2017

Area of Science:

Molecular Biology
Genetics
Biotechnology

Background:

Accurate detection of genetic variations is crucial for understanding gene function and disease.
Analyzing RNA transcripts provides insights into gene expression and regulation.
Distinguishing parental alleles is important for studies of inheritance and imprinting.

Purpose of the Study:

To develop and validate a novel Fluorescence In Situ Hybridization (FISH) based method for detecting single-nucleotide variants (SNVs).
To apply this method for quantifying allelic expression in both cell populations and single cells.
To utilize the method for differentiating maternal and paternal chromosomes within single cells.

Main Methods:

Development of a FISH assay for high-efficiency detection of SNVs.
Application of the FISH method to RNA transcripts, covering both exonic and intronic regions.
Quantification of allelic expression using the developed FISH technique.

Main Results:

High efficiency in detecting SNVs on individual RNA transcripts.
Successful quantification of allelic expression in cell populations.
Demonstrated ability to distinguish maternal from paternal chromosomes in single cells.

Conclusions:

The developed FISH-based method offers a powerful tool for SNV detection in RNA.
This technique enables precise allelic expression analysis at both population and single-cell levels.
The method facilitates the identification of parental chromosome origins in individual cells, advancing genetic studies.