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Comparing Copy Number Variations and SNPs

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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.
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Related Experiment Video

Updated: May 17, 2026

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)

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Published on: August 21, 2016

Mapping recently identified nucleotide variants in the genome and transcriptome.

Chun-Xiao Song¹, Chengqi Yi, Chuan He

¹Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois, USA.

Nature Biotechnology

|November 10, 2012

Summary

Epigenetic regulation involves more than just 5-methylcytosine in DNA. New nucleotide variants like 5-hydroxymethylcytosine and N6-methyladenosine in RNA expand our understanding of cell status and epigenetic networks.

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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)

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A Fast and Quantitative Method for Post-translational Modification and Variant Enabled Mapping of Peptides to Genomes

A Fast and Quantitative Method for Post-translational Modification and Variant Enabled Mapping of Peptides to Genomes

Published on: May 22, 2018

Area of Science:

Molecular Biology
Epigenetics
Genomics

Background:

Nucleotide variants offer regulatory information beyond DNA sequence, influencing cell status in eukaryotes.
Historically, 5-methylcytosine was the sole focus of epigenetic studies in eukaryotes.
Emerging research reveals a complex epigenetic network involving 5-hydroxymethylcytosine, 5-formylcytosine, 5-carboxylcytosine, and N6-methyladenosine in RNA.

Purpose of the Study:

To highlight the expanding landscape of epigenetic modifications beyond 5-methylcytosine.
To underscore the significance of newly discovered nucleotide variants in epigenetic regulation.
To emphasize the role of technological advancements in epigenetic research.

Main Methods:

Review of recent advancements in identifying and sequencing modified nucleotides.
Application of bisulfite sequencing for 5-methylcytosine analysis.
Development of modified bisulfite sequencing techniques for base-resolution analysis of 5-hydroxymethylcytosine and 5-methylcytosine.

Main Results:

The discovery of multiple DNA and RNA nucleotide variants has significantly advanced the field of epigenetics.
New technologies enable precise detection and sequencing of these epigenetic marks.
Modified bisulfite sequencing allows differentiation of 5-hydroxymethylcytosine from 5-methylcytosine at base resolution.

Conclusions:

The epigenome is a dynamic network involving diverse nucleotide modifications.
Technological innovation is crucial for dissecting complex epigenetic mechanisms.
Further research into these variants will deepen our understanding of gene regulation and cell identity.