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Related Concept Videos

The Significance of Membrane Transport01:44

The Significance of Membrane Transport

The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and are...
The Significance of Membrane Transport01:44

The Significance of Membrane Transport

The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Active Transport01:14

Active Transport

Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
Electron Transport Chain Components01:29

Electron Transport Chain Components

The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
Chemiosmosis and ATP Synthesis01:22

Chemiosmosis and ATP Synthesis

The electron transport chain is a critical component of cellular respiration, occurring in the inner mitochondrial membrane. It facilitates the transfer of high-energy electrons from reduced cofactors NADH and FADH₂ to molecular oxygen, the final electron acceptor. This transfer of electrons through a series of protein complexes is tightly coupled to the translocation of protons across the membrane, generating a proton gradient essential for ATP synthesis.Electron Flow and Proton...

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Related Experiment Video

Updated: Jun 25, 2026

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
07:38

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

Published on: March 30, 2015

Proton transport and cell function.

H E Ives, F C Rector

    The Journal of Clinical Investigation
    |February 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Hydrogen ion (H+) transport is crucial for cell function, regulating intracellular pH, creating localized pH gradients for energy, and enabling transepithelial transport. This review details H+ translocating mechanisms and their cellular roles.

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    Application of Electrophysiology Measurement to Study the Activity of Electro-Neutral Transporters
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    Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
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    Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

    Published on: April 16, 2018

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    Last Updated: Jun 25, 2026

    Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
    07:38

    Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

    Published on: March 30, 2015

    Application of Electrophysiology Measurement to Study the Activity of Electro-Neutral Transporters
    11:51

    Application of Electrophysiology Measurement to Study the Activity of Electro-Neutral Transporters

    Published on: February 3, 2018

    Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
    09:00

    Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

    Published on: April 16, 2018

    Area of Science:

    • Cellular Physiology
    • Biochemistry
    • Molecular Biology

    Background:

    • Recent years show increased understanding of hydrogen ion (H+) transport's diverse roles in cellular functions.
    • H+ transport is implicated in regulating intracellular pH, generating localized pH gradients, and transepithelial ion transport.

    Purpose of the Study:

    • To review the mechanisms of H+ translocation.
    • To explore the cellular functions regulated by H+ transport.

    Main Methods:

    • Literature review of recent advancements in H+ transport research.
    • Categorization of H+ translocating mechanisms.
    • Analysis of cellular processes influenced by H+ transport.

    Main Results:

    • Identified key H+ translocating mechanisms.
    • Detailed the involvement of H+ transport in intracellular pH homeostasis.
    • Highlighted the role of H+ gradients in energy transduction and transepithelial transport.

    Conclusions:

    • H+ transport is a fundamental process underlying critical cellular functions.
    • Understanding H+ translocating mechanisms is key to comprehending cellular regulation and energy metabolism.