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  2. Ion channel - Wikipedia

    en.wikipedia.org/wiki/Ion_channel

    Ion channels are located within the membrane of all excitable cells, [3] and of many intracellular organelles. They are often described as narrow, water-filled tunnels that allow only ions of a certain size and/or charge to pass through. This characteristic is called selective permeability.

  3. Voltage-gated ion channel - Wikipedia

    en.wikipedia.org/wiki/Voltage-gated_ion_channel

    Voltage-gated ion channels are a class of transmembrane proteins that form ion channels that are activated by changes in a cell's electrical membrane potential near the channel. The membrane potential alters the conformation of the channel proteins, regulating their opening and closing. Cell membranes are generally impermeable to ions, thus ...

  4. Gating (electrophysiology) - Wikipedia

    en.wikipedia.org/wiki/Gating_(electrophysiology)

    Gating (electrophysiology) An animated representation of the molecular structure of a simple ion channel. In electrophysiology, the term gating refers to the opening (activation) or closing (by deactivation or inactivation) of ion channels. [1] This change in conformation is a response to changes in transmembrane voltage.

  5. Ligand-gated ion channel - Wikipedia

    en.wikipedia.org/wiki/Ligand-gated_ion_channel

    Ligand-gated ion channels (LICs, LGIC), also commonly referred to as ionotropic receptors, are a group of transmembrane ion-channel proteins which open to allow ions such as Na +, K +, Ca 2+, and/or Cl − to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand), such as a neurotransmitter. [1][2][3] When ...

  6. Sodium channel - Wikipedia

    en.wikipedia.org/wiki/Sodium_channel

    Sodium channel. C is the sodium channel. Sodium channels are integral membrane proteins that form ion channels, conducting sodium ions (Na +) through a cell's membrane. [1][2] They belong to the superfamily of cation channels.

  7. Potassium channel - Wikipedia

    en.wikipedia.org/wiki/Potassium_channel

    Tandem pore domain potassium channel - are constitutively open or possess high basal activation, such as the "resting potassium channels" or "leak channels" that set the negative membrane potential of neurons. Voltage-gated potassium channel - are voltage-gated ion channels that open or close in response to changes in the transmembrane voltage.

  8. Membrane channel - Wikipedia

    en.wikipedia.org/wiki/Membrane_channel

    Membrane channel. Membrane channels are a family of biological membrane proteins which allow the passive movement of ions (ion channels), water (aquaporins) or other solutes to passively pass through the membrane down their electrochemical gradient. They are studied using a range of channelomics experimental and mathematical techniques.

  9. Transient receptor potential channel - Wikipedia

    en.wikipedia.org/wiki/Transient_receptor...

    Transient receptor potential channels (TRP channels) are a group of ion channels located mostly on the plasma membrane of numerous animal cell types. Most of these are grouped into two broad groups: Group 1 includes TRPC ( "C" for canonical), TRPV ("V" for vanilloid), TRPVL ("VL" for vanilloid-like), TRPM ("M" for melastatin), TRPS ("S" for soromelastatin), TRPN ("N" for mechanoreceptor ...

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