ACTH is a segment of a much larger glycoprotein prohormone molecule called proopiomelanocortin (POMC). POMC is synthesized by the corticotrophs of the anterior pituitary, which constitute about 10 percent of the gland.
Caviar harvested from an older fish is the more rare, and more sought after, white caviar. The Beluga sturgeon are primarily found in the Caspian Sea, which is surrounded by Iran, Azerbaijan, Russia, Kazakhstan and Turkmenistan. The other primary source of Beluga sturgeon is the Black Sea near Russia and Romania.
For sturgeon caviar it is considered that the larger and lighter the grains, the better the caviar. Red caviar is obtained from salmon fishes: keta (dog salmon), pink salmon, red salmon, king salmon, coho salmon and trout; it is processed with the solution of table salt with subsequent addition of preservatives.