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An example of a chloride-bicarbonate antiporter is the chloride anion exchanger, also known as down-regulated in adenoma (protein DRA). It is found in the intestinal mucosa , especially in the columnar epithelium and goblet cells of the apical surface of the membrane, where it carries out the function of chloride and bicarbonate exchange. [ 39 ]
A symporter is an integral membrane protein that is involved in the transport of two (or more) different molecules across the cell membrane in the same direction. The symporter works in the plasma membrane and molecules are transported across the cell membrane at the same time, and is, therefore, a type of cotransporter .
An example of an antiporter mediated transport protein is the sodium-calcium antiporter, a transport protein involved in keeping the cytoplasmic concentration of calcium ions in the cells, low. This transport protein is an antiporter system because it transports three sodium ions across the plasma membrane in exchange for a calcium ion, which ...
An example is the glucose symporter SGLT1, which co-transports one glucose (or galactose) molecule into the cell for every two sodium ions it imports into the cell. [27] This symporter is located in the small intestines, [28] heart, [29] and brain. [30] It is also located in the S3 segment of the proximal tubule in each nephron in the kidneys. [31]
antiporter (also called exchanger or counter-transporter): move a molecule against its gradient and at the same time displaces one or more ions along its gradient. The molecules move in opposite directions. symporter: move a molecule against its gradient while displacing one or more different ions along their gradient. The molecules move in the ...
Antiporter proteins transport one molecule down its concentration gradient to transport another molecule against its concentration gradient, but the molecules diffuse in opposite directions. As symporters and antiporters are involved in coupling the transport of two molecules, they are commonly referred to as cotransporters.
Diffusion vs. Transport. In biology, an ion transporter is a transmembrane protein that moves ions (or other small molecules) across a biological membrane to accomplish many different biological functions, including cellular communication, maintaining homeostasis, energy production, etc. [1] There are different types of transporters including pumps, uniporters, antiporters, and symporters.
An example of an antiporter is the sodium-calcium exchanger. ... An example of a symporter is the sodium-glucose linked transporter or SGLT. ... 4 languages ...