Parathyroid hormone (PTH) is the most important endocrine regulator of calcium and phosphorus concentration in extracellular fluid, which is secreted by the chief cell of the parathyroid glands as a polypeptide containing 84 amino acids.
KB130015 is a novel activator of hERG1 potassium channels, blocking native and recombinant hERG1 channels at high voltages, but activating them at low voltages.