The hormone is known as the parathyroid hormone. And this parathyroid hormone is produced in special cells inside the parathyroid gland known as the parathyroid chief cells or the parathyroid principal cells. And these cells basically produce and secrete the parathyroid hormone. Now, the parathyroid hormone is a peptide hormone and what that basically means is it is produced in the rough endoplasm reticulum of the chief cells and then it is modified in the golgi apparatus. Now, because it's a peptide hormone, that implies it's water soluble and so it is soluble in our blood. And that means we do not require any type of protein carrier to actually transport the parathyroid hormone in our blood system.