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What is Gene Expression?

What is Gene Expression?

Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...

What is Gene Expression?

What is Gene Expression?

A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...

Cell Specific Gene Expression

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

Cell Specific Gene Expression

Cell Specific Gene Expression

Chromatin Position Affects Gene Expression

Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...

mRNA Stability and Gene Expression

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability

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Related Experiment Video

Updated: Feb 7, 2026

Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells

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zfRegeneration: a database for gene expression profiling during regeneration.

Rocío Nieto-Arellano¹, Héctor Sánchez-Iranzo¹

¹Independent Researcher, Boxbergring 107, Heidelberg, Germany.

Bioinformatics (Oxford, England)

|July 28, 2018

Summary

Researchers developed zfRegeneration, a novel database for zebrafish regeneration studies. This resource offers easy access to RNA-Seq data, enhancing gene expression analysis for regeneration research.

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Area of Science:

Developmental Biology
Genomics
Bioinformatics

Background:

Zebrafish (Danio rerio) are a key model organism for studying organ regeneration.
RNA-sequencing (RNA-Seq) is widely used to investigate regeneration processes.
A lack of centralized, accessible databases hinders comprehensive analysis of zebrafish regeneration RNA-Seq data.

Purpose of the Study:

To develop the first comprehensive database for zebrafish regeneration RNA-Seq data.
To provide a user-friendly platform for accessing and analyzing regeneration-related gene expression.
To facilitate collaboration and data sharing among researchers studying diverse organ regeneration in zebrafish.

Main Methods:

Development of a dedicated web interface for the zfRegeneration database.
Integration of a large collection of RNA-Seq datasets.
Implementation of tools for data visualization, including expression level plots, differential expression analysis, gene correlation, and dataset comparison.

Main Results:

The zfRegeneration database offers easy access to numerous RNA-Seq datasets.
Customizable plots and analysis tools enable detailed examination of gene expression patterns.
Case studies demonstrate the platform's utility in analyzing and understanding gene expression during regeneration.

Conclusions:

zfRegeneration provides a unique and valuable resource for the scientific community.
The database enhances the study of gene expression in zebrafish regeneration.
It aims to overcome data accessibility barriers and foster interdisciplinary research in regeneration.