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Related Concept Videos

Translation01:31

Translation

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
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Initiation of Translation02:33

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Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
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Energy Stored in a Capacitor01:12

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When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
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Termination of Translation01:44

Termination of Translation

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The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
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Energy Stored in Capacitors01:10

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A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
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Energy Stored in Inductors01:16

Energy Stored in Inductors

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An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
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Working with Human Tissues for Translational Cancer Research
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Reanimation of Stored Tissue Biopsies: A Functional Study and Translational Approach.

Veronica Alfano1,2, Gabriele Ruffolo1,3, Antonella Spila1

  • 1IRCCS San Raffaele Roma, 00166 Rome, Italy.

International Journal of Molecular Sciences
|February 13, 2026
PubMed
Summary

Researchers developed a novel method to study frozen colon cancer tissues using Xenopus oocytes. This technique allows functional analysis of cancer cell membranes, revealing altered chloride channel activity as a potential therapeutic target.

Keywords:
Xenopus oocyte modelcancerfunctional studyion channelsmicrotransplantationtranslational approach

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Area of Science:

  • Biotechnology
  • Cancer Research
  • Translational Medicine

Background:

  • Biobanked tissues are valuable for research but functional studies are limited to fresh samples.
  • Investigating frozen cancer biopsies requires methods to restore membrane function.

Purpose of the Study:

  • To develop a method for functional analysis of frozen colon cancer biopsies.
  • To characterize colon cancer cell membrane properties and their role in signaling and ion currents.
  • To explore neurotransmitter roles and ion channel activity in colon cancer.

Main Methods:

  • Microtransplantation of patient-derived colon cancer cell membranes into Xenopus laevis oocytes.
  • Immunohistochemistry and confocal microscopy for membrane incorporation assessment.
  • Two-electrode voltage clamp recordings for functional ion current analysis.

Main Results:

  • Successful incorporation of colon cancer membranes into oocytes confirmed by markers and ultrastructure.
  • Oocytes with cancer membranes showed suppressed endogenous calcium-activated chloride currents.
  • No functional responses to tested neurotransmitters were observed.

Conclusions:

  • Membrane microtransplantation into Xenopus oocytes is a viable method for functional analysis of frozen cancer biopsies.
  • Altered chloride channel activity in colon cancer warrants further investigation as a therapeutic target.