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Related Concept Videos

Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
Recycling Endosomes and Transcytosis00:58

Recycling Endosomes and Transcytosis

The recycling endosome, also known as the endosomal recycling compartment (ERC), is a part of the slow-recycling process of the endocytic pathway. Molecules internalized through receptor-mediated endocytosis are either degraded in the lysosomes or are recycled to the plasma membrane through the fast- or slow-recycling route.
The recycling endosome is not a single organelle but an extensively tubulated network of recycling pathways. It functions in storing molecules or transporting them across...
The Movement of Organelles and Vesicles01:43

The Movement of Organelles and Vesicles

In eukaryotic cells,  cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
The transport of soluble and membrane proteins is mediated by transport vesicles that collect cargo from one cellular compartment and deliver it to another by fusing with the target organelle membrane. The Rab...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...

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Related Experiment Video

Updated: Jul 11, 2026

Visualizing Cell-to-cell Transfer of HIV using Fluorescent Clones of HIV and Live Confocal Microscopy
13:08

Visualizing Cell-to-cell Transfer of HIV using Fluorescent Clones of HIV and Live Confocal Microscopy

Published on: October 7, 2010

Lessons from HIV: movement of macromolecules inside the cell.

O T Fackler1, B M Peterlin, K Weis

  • 1Howard Hughes Medical Institute, Department of Medicine, University of California, San Francisco, USA.

Current Molecular Medicine
|March 20, 2002
PubMed
Summary

Molecular investigations of the Human Immunodeficiency Virus (HIV) have significantly advanced eukaryotic biology. These studies revealed new insights into gene transcription, molecular export, and cellular processes.

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Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques
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Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

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Last Updated: Jul 11, 2026

Visualizing Cell-to-cell Transfer of HIV using Fluorescent Clones of HIV and Live Confocal Microscopy
13:08

Visualizing Cell-to-cell Transfer of HIV using Fluorescent Clones of HIV and Live Confocal Microscopy

Published on: October 7, 2010

Phagosome Migration and Velocity Measured in Live Primary Human Macrophages Infected with HIV-1
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Phagosome Migration and Velocity Measured in Live Primary Human Macrophages Infected with HIV-1

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Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques
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Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

Published on: September 25, 2018

Area of Science:

  • Molecular Biology
  • Eukaryotic Biology
  • Virology

Background:

  • Human Immunodeficiency Virus (HIV) research has historically driven significant advancements in molecular and cellular biology.
  • Understanding fundamental cellular processes is crucial for combating viral infections and other diseases.

Purpose of the Study:

  • To highlight the foundational contributions of Human Immunodeficiency Virus (HIV) research to eukaryotic biology.
  • To underscore how HIV studies have reshaped our understanding of key cellular mechanisms.

Main Methods:

  • Review of molecular biological investigations focused on HIV.
  • Analysis of published findings concerning HIV's impact on host cell processes.

Main Results:

  • HIV research has elucidated novel paradigms in eukaryotic transcription.
  • Studies revealed new mechanisms for RNA and protein export from the nucleus to the cytoplasm.
  • Investigations uncovered insights into cellular activation, morphology, and vesicular trafficking.

Conclusions:

  • Molecular biological studies of HIV have fundamentally advanced the understanding of eukaryotic cell biology.
  • HIV research continues to provide critical insights into essential cellular functions.