Definitions for ion pump

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Princeton's WordNet

  1. ion pump(noun)

    a vacuum pump that removes gas by ionizing the atoms or molecules and adsorbing them on a metal surface

Freebase

  1. Ion transporter

    In biology, an ion transporter, also called an ion pump, is a transmembrane protein that moves ions across a plasma membrane against their concentration gradient, in contrast to ion channels, where ions go through passive transport. These primary transporters are enzymes that convert energy from various sources, including ATP, sunlight, and other redox reactions, to potential energy stored in an electrochemical gradient. This energy is then used by secondary transporters, including ion carriers and ion channels, to drive vital cellular processes, such as ATP synthesis.

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