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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 ...
This protein recruits a small GTPase called Sar1. Sar1 can be thought of as a switch which is active when bound to GTP and inactive when it hydrolyses the GTP to GDP. This in turn leads to the recruitment of a protein complex, the Sec23/Sec24 and the Sec13/Sec31 complex (also known as the COPII coat). The protein complexes form a mesh at the ER ...
Every carrier protein, especially within the same cell membrane, is specific to one type or family of molecules. GLUT1 is a named carrier protein found in almost all animal cell membranes that transports glucose across the bilayer. This protein is a uniporter, meaning it transports glucose along its concentration in a singular direction. It is ...
Electron micrograph of in vitro–formed COPI-coated vesicles. Average vesicle diameter at the membrane level is 60 nm. COPI is a coatomer, a protein complex [1] that coats vesicles transporting proteins from the cis end of the Golgi complex back to the rough endoplasmic reticulum (ER), where they were originally synthesized, and between Golgi compartments.
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Excitatory amino acid transporter 1 (EAAT1) is a protein that, in humans, is encoded by the SLC1A3 gene. [5] EAAT1 is also often called the GLutamate ASpartate Transporter 1 ( GLAST-1 ). EAAT1 is predominantly expressed in the plasma membrane, allowing it to remove glutamate from the extracellular space. [ 6 ]
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An organic cation transport protein mediates the transport of organic cations across the cell membrane. These proteins are members of the solute carrier family , subfamily 22. This family of proteins can also transport zwitterions and anions , though it is a different subfamily of solute carrier proteins than the organic anion transporters .