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Related Concept Videos

Clamper Circuit01:14

Clamper Circuit

399
A clamper circuit, also known as a DC restorer, represents a specialized variant of the rectifier circuit, notable for its method of taking the output across the diode rather than the capacitor. This configuration lends to several distinctive applications, particularly in handling square wave inputs.
Within this circuit, the diode's orientation prompts the capacitor to charge up to the level of the most negative peak of the input signal. Upon reaching this state, the diode ceases to...
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Reproductive Cloning01:27

Reproductive Cloning

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Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic...
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Clipper Circuit01:18

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A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
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Exon Recombination02:32

Exon Recombination

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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon...
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Restarting Stalled Replication Forks02:37

Restarting Stalled Replication Forks

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DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
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Cloning of Dolly the Sheep01:08

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The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual,  the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter...
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Related Experiment Video

Updated: Jun 21, 2025

Detection of a CDH1 Rare Transcript Variant in Fresh-frozen Gastric Cancer Tissues by Chip-based Digital PCR
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A CHip off the old block.

Giusy Della Gatta1, Asha Pillai2

  • 1Oncology and Angiogenesis, Regeneron Therapeutics, Tarrytown, NY, USA.

Science Immunology
|July 5, 2024
PubMed
Summary

Upstream promoters influence ST2 expression and T helper 1 (TH1) cell function. These lineage-specific effects are crucial for understanding TH1 cell activity.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • T helper 1 (TH1) cells are critical immune responders.
  • ST2 is a receptor involved in TH1 cell responses.
  • Upstream promoter regions regulate gene expression.

Purpose of the Study:

  • To investigate how upstream promoters affect ST2 expression.
  • To determine the impact of these promoter effects on TH1 cell effector function.

Main Methods:

  • Analysis of ST2 gene promoter activity in TH1 cells.
  • Assays to measure ST2 expression levels.
  • Functional assays to assess TH1 cell effector functions.

Main Results:

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  • Identified lineage-specific promoter elements influencing ST2 expression.
  • Demonstrated that altered ST2 expression impacts TH1 cell cytokine production and proliferation.
  • Showcased differential promoter activity based on T cell lineage.

Conclusions:

  • Upstream promoters play a significant role in regulating ST2 expression in a lineage-specific manner.
  • These regulatory mechanisms directly influence TH1 cell effector functions.
  • Understanding these promoter effects provides insights into TH1 cell biology and potential therapeutic targets.