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Channel proteins, one of the two classes of membrane transport proteins, allow specific solutes to passively traverse [[Lipid bilayer|lipid bilayers]] through an aqueous pore. Most solutes that pass through channel proteins have a specified molecular weight and charge and are inorganic ions. The concentration and electrical gradients of charged ions determines the direction of flow of the ions through the membrane: they move from an area of high to low concentration in processes known as either [[ | Channel proteins, one of the two classes of membrane transport [[proteins|proteins]], allow specific solutes to passively traverse [[Lipid bilayer|lipid bilayers]] through an [[aqueous pore|aqueous pore]]. Most solutes that pass through channel proteins have a specified [[molecular weight|molecular weight]] and charge and are inorganic ions. The concentration and electrical gradients of charged ions determines the direction of flow of the ions through the membrane: they move from an area of high to low concentration in processes known as either [[passive transport|passive transport]] or [[Facilitated diffusion|facilitated diffusion]]. The movement of [[ions|ions]] through transporters, the other class of membrane transport proteins, is mediated in contrast to channel proteins either actively or passively <ref>(Molecular Biology Of The Cell, Alberts, et al., 2008, 653)</ref>. <br> | ||
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Revision as of 21:37, 21 October 2012
Channel proteins, one of the two classes of membrane transport proteins, allow specific solutes to passively traverse lipid bilayers through an aqueous pore. Most solutes that pass through channel proteins have a specified molecular weight and charge and are inorganic ions. The concentration and electrical gradients of charged ions determines the direction of flow of the ions through the membrane: they move from an area of high to low concentration in processes known as either passive transport or facilitated diffusion. The movement of ions through transporters, the other class of membrane transport proteins, is mediated in contrast to channel proteins either actively or passively [1].
References
- ↑ (Molecular Biology Of The Cell, Alberts, et al., 2008, 653)