Uniporters, Symporters and Antiporters
Uniporters, symporters, and antiporters are proteins that are used in transport of substances across a cell membrane. Uniporters are involved in facilitated diffusion and work by binding to one molecule of substrate at a time to move it along its concentration gradient. Symporters and antiporters are involved in active transport. Antiporters transport molecules in opposite directions, while symporters transport molecules in the same direction.
Topics
- uniporter
- symporter
- antiporter
- facilitated diffusion
- concentration gradient
- primary active transport
- secondary active transport
- sodium-potassium pump
- membrane potential
- ATP
- ATPase
- proton pump
- exchanger
- cotransporter