Protein-protein inte … aquaporins are tetrameric membrane-bound channels that facilitate transport of water and other small solutes across cell membranes. in eukaryotes, they are frequently regulated by gating or trafficking, allowing for the cell to control membrane permeability in a specific manner.. Aquaporins are a very lucky family of membrane proteins, which are notoriously resistant against structure determination. we have now high resolution structures of several aqps: glpf, aqp1, aqp0, and aqpz. more structures are expected to emerge soon.. Aquaporins: channels that transport water. ion channels: channels that selectively transport certain ions. carrier proteins: transmembrane proteins (that have a hydrophilic and hydrophobic part.
A carrier protein is a transport protein that is specific for an ion, molecule, or group of substances. carrier proteins "carry" the ion or molecule across the membrane by changing shape after the binding of the ion or molecule. carrier proteins are involved in passive and active transport..
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