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Related Concept Videos

Polytene Chromosomes02:04

Polytene Chromosomes

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Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
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Spindle Assembly02:50

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Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
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Attachment of Sister Chromatids02:57

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As cells progress into mitosis, the nuclear envelope breaks down, and the condensed chromosomes are exposed to the array of bipolar microtubules of the mitotic spindle. The kinetochore, a large, disc-shaped protein complex, is present at the centromere region of the sister chromatids and acts as a binding site for the microtubules.  Usually, the plus-end of a single microtubule is embedded within the kinetochore. However, some kinetochores first establish lateral contact with the side-wall...
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Lampbrush Chromosomes01:51

Lampbrush Chromosomes

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In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
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Chromosome Structure02:40

Chromosome Structure

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A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
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Telomeres consist of non-coding repetitive nucleotide...
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Condensins02:15

Condensins

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Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
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Related Experiment Video

Updated: Jun 20, 2025

Rapid Assembly of Multi-Gene Constructs using Modular Golden Gate Cloning
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Modular Assembly of Synthetic Secondary Chromosomes.

Celine Zumkeller1, Daniel Schindler2,3, Jennifer Felder4

  • 1Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Branch for Bioresources, Giessen, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|July 19, 2024
PubMed
Summary
This summary is machine-generated.

Scientists created a new DNA assembly pipeline for building synthetic chromosomes in E. coli. This modular cloning system enables learning-by-building to understand chromosome construction and genetic information maintenance.

Keywords:
DNA librariesEscherichia coliGenome engineeringModular cloningOligo designSynVicIISynthetic chromosomes

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Area of Science:

  • Synthetic biology
  • Genomics
  • Molecular biology

Background:

  • Recent advancements in DNA assembly methods enable the creation of synthetic replicons.
  • A learning-by-building approach is crucial for understanding chromosome construction and genetic information maintenance.

Purpose of the Study:

  • To describe an efficient pipeline for designing and assembling synthetic, secondary chromosomes in Escherichia coli.
  • To leverage the modular cloning (MoClo) system for streamlined chromosome synthesis.

Main Methods:

  • Utilized the modular cloning (MoClo) system for DNA assembly.
  • Developed a pipeline for the design and construction of synthetic chromosomes.
  • Employed a learning-by-building strategy in Escherichia coli.

Main Results:

  • Successfully designed and assembled synthetic, secondary chromosomes in E. coli.
  • Demonstrated an efficient pipeline for chromosome construction.
  • Provided a framework for answering fundamental questions about chromosome architecture.

Conclusions:

  • The MoClo-based pipeline offers an efficient method for synthetic chromosome assembly.
  • This approach facilitates a deeper understanding of chromosome structure and function.
  • Synthetic chromosome technology holds promise for basic research and biotechnology.