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Related Concept Videos

General Transcription Factors01:30

General Transcription Factors

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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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...
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Background and Environment Affect Phenotype02:27

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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Position-effect Variegation02:32

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Related Experiment Video

Updated: Apr 3, 2026

Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages
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IMDD: A Database for Exploring Tissue-Specific Gene Expression Dynamics During Holometabolous Insects.

Haoran Xu1, Jiahe Sun1, Fang Lu1

  • 1Biological Science Research Center, Southwest University, Chongqing 400715, China.

Journal of Molecular Biology
|April 1, 2026
PubMed
Summary

The Insect Metamorphic Development Database (IMDD) offers a new resource for studying insect metamorphosis. It provides extensive gene expression data to explore developmental gene regulation in key species.

Keywords:
gene expressioninsectsintegration databasemetamorphosis development

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Area of Science:

  • Developmental Biology
  • Genomics
  • Bioinformatics

Background:

  • Insect metamorphosis involves complex, stage-specific gene expression patterns.
  • Understanding these regulatory programs is crucial for various biological and applied fields.
  • Existing resources may lack comprehensive data integration for comparative developmental studies.

Purpose of the Study:

  • To develop an interactive database, the Insect Metamorphic Development Database (IMDD), for exploring gene expression dynamics during insect metamorphosis.
  • To provide a centralized platform for analyzing transcriptomic and single-cell data across multiple holometabolous insect species.
  • To facilitate research into the spatiotemporal gene regulatory networks governing developmental transitions.

Main Methods:

  • Integrated over 1,200 bulk-tissue transcriptomes.
  • Incorporated more than 1.4 million single-cell profiles.
  • Developed a user-friendly web interface for data exploration and analysis.

Main Results:

  • The IMDD covers four key holometabolous species: Drosophila melanogaster, Bombyx mori, Aedes aegypti, and Apis mellifera.
  • The database offers broad coverage of developmental stages at both tissue and single-cell resolutions.
  • Researchers can investigate dynamic gene expression, cellular heterogeneity, and cell-type transitions.

Conclusions:

  • The IMDD is a valuable, freely accessible resource for the scientific community.
  • It empowers researchers to dissect the molecular mechanisms underlying insect metamorphosis.
  • Facilitates deeper understanding of insect development and evolution.