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Related Concept Videos

Cis-regulatory Sequences02:02

Cis-regulatory Sequences

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Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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Structure of a Gene01:30

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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Updated: Jun 27, 2025

A Semi-high-throughput Imaging Method and Data Visualization Toolkit to Analyze C. elegans Embryonic Development
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Unveiling Gene Expression Dynamics during Early Embryogenesis in Cynoglossus semilaevis: A Transcriptomic

Xinyi Cheng1,2, Wei Jiang3, Qian Wang4,5

  • 1School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China.

Life (Basel, Switzerland)
|April 27, 2024
PubMed
Summary

Early fish development involves significant gene network changes, especially during the maternal-to-zygotic transition. This study reveals distinct gene functions in gametes and embryonic stages of the Chinese tongue sole.

Keywords:
CynoglossidaeCynoglossus semilaevisearly embryonic developmentgametestranscriptomics

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RNA-Seq Analysis of Differential Gene Expression in Electroporated Chick Embryonic Spinal Cord
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Area of Science:

  • Developmental Biology
  • Genomics
  • Comparative Vertebrate Embryology

Background:

  • Early metazoan development, from sperm-egg fusion to gastrulation, involves critical gene network remodeling, particularly the maternal-to-zygotic transition.
  • Gene expression dynamics during early embryogenesis are not well understood across most metazoan lineages.

Purpose of the Study:

  • To investigate the gene expression dynamics during early embryonic development in the Chinese tongue sole (Cynoglossus semilaevis).
  • To identify functional enrichments in gametes and across different embryonic stages, from the four-cell to gastrula stage.

Main Methods:

  • Transcriptomic profiling of oocytes, sperms, and early embryos (four-cell to gastrula stages).
  • Comparative transcriptome analysis to identify large-scale zygotic genome activation (ZGA).
  • Functional analysis of co-expression modules to determine distinct functional enrichments.

Main Results:

  • Large-scale zygotic genome activation (ZGA) was observed in the blastula stage, similar to zebrafish.
  • Distinct functional enrichments were identified: sperm (actin, immune functions); oocytes and pre-ZGA embryos (mitosis, transcription inhibition, mitochondrial function); post-ZGA embryos (organ development).

Conclusions:

  • Provides insights into the transcriptional regulation of early embryonic development in Cynoglossidae fish.
  • Expands understanding of developmental constraints in vertebrates through comparative transcriptomics.