Warning: The NCBI web site requires JavaScript to function. more...
An official website of the United States government
The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.
The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Potassium, Dietary
Potassium or potassium compounds used in foods or as foods.
Year introduced: 1993
Potassium
An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
Diuretics, Potassium Sparing
A subclass of diuretics that limits the secretion of POTASSIUM into the URINE.
Year introduced: 2013
Potassium Ionophores
Chemical agents that increase the permeability of CELL MEMBRANES to POTASSIUM ions.
Year introduced: 2012
G Protein-Coupled Inwardly-Rectifying Potassium Channels
A family of inwardly-rectifying potassium channels that are activated by PERTUSSIS TOXIN sensitive G-PROTEIN-COUPLED RECEPTORS. GIRK potassium channels are primarily activated by the complex of GTP-BINDING PROTEIN BETA SUBUNITS and GTP-BINDING PROTEIN GAMMA SUBUNITS.
Year introduced: 2006(1993)
Shal Potassium Channels
A shaker subfamily of potassium channels that participate in transient outward potassium currents by activating at subthreshold MEMBRANE POTENTIALS, inactivating rapidly, and recovering from inactivation quickly.
Year introduced: 2006(1990)
Shaw Potassium Channels
A shaker subfamily that is prominently expressed in NEURONS and are necessary for high-frequency, repetitive firing of ACTION POTENTIALS.
Year introduced: 2006(1994)
Shab Potassium Channels
A subfamily of shaker potassium channels that shares homology with its founding member, Shab protein, Drosophila. They regulate delayed rectifier currents in the NERVOUS SYSTEM of DROSOPHILA and in the SKELETAL MUSCLE and HEART of VERTEBRATES.
Year introduced: 2006(2005)
Delayed Rectifier Potassium Channels
A group of slow opening and closing voltage-gated potassium channels. Because of their delayed activation kinetics they play an important role in controlling ACTION POTENTIAL duration.
Kv1.6 Potassium Channel
A delayed rectifier subtype of shaker potassium channels that has been described in NEURONS and ASTROCYTES.
Year introduced: 2006(2004)
Kv1.5 Potassium Channel
A delayed rectifier subtype of shaker potassium channels that conducts a delayed rectifier current. It contributes to ACTION POTENTIAL repolarization of MYOCYTES in HEART ATRIA.
Year introduced: 2006(1995)
Kv1.4 Potassium Channel
A fast inactivating subtype of shaker potassium channels that contains two inactivation domains at its N terminus.
Kv1.3 Potassium Channel
A delayed rectifier subtype of shaker potassium channels that is the predominant VOLTAGE-GATED POTASSIUM CHANNEL of T-LYMPHOCYTES.
Kv1.2 Potassium Channel
A delayed rectifier subtype of shaker potassium channels that is selectively inhibited by a variety of SCORPION VENOMS.
Kv1.1 Potassium Channel
A delayed rectifier subtype of shaker potassium channels that is commonly mutated in human episodic ATAXIA and MYOKYMIA.
Intermediate-Conductance Calcium-Activated Potassium Channels
A major class of calcium-activated potassium channels that were originally discovered in ERYTHROCYTES. They are found primarily in non-excitable CELLS and set up electrical gradients for PASSIVE ION TRANSPORT.
Year introduced: 2006(1997)
KCNQ3 Potassium Channel
A very slow opening and closing voltage-gated potassium channel that is expressed in NEURONS and is closely related to KCNQ2 POTASSIUM CHANNEL. It is commonly mutated in BENIGN FAMILIAL NEONATAL CONVULSIONS.
Year introduced: 2006(1998)
KCNQ2 Potassium Channel
A very slow opening and closing voltage-gated potassium channel that is expressed in NEURONS and is commonly mutated in BENIGN FAMILIAL NEONATAL CONVULSIONS.
KCNQ1 Potassium Channel
A voltage-gated potassium channel that is expressed primarily in the HEART.
Year introduced: 2006(1996)
KCNQ Potassium Channels
A family of delayed rectifier voltage-gated potassium channels that share homology with their founding member, KCNQ1 PROTEIN. KCNQ potassium channels have been implicated in a variety of diseases including LONG QT SYNDROME; DEAFNESS; and EPILEPSY.