Symporters are transport proteins that simultaneously transport two substances across the membrane in the same direction; one against the concentration gradient and one with the concentration gradient. Symporters often use proton motive force to transport a substrate across the membrane. The movement of protons across the membrane (proton motive force) provides the energy for transporting the substrate.

Illustration of Active Transport: Symporter.jpg by Gary E. Kaiser, Ph.D.
Professor of Microbiology, The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at https://cwoer.ccbcmd.edu/science/microbiology/index_gos.html.

Last updated: Feb., 2021
Please send comments and inquiries to Dr. Gary Kaiser