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.
The word Almost means diamond, a fitting name for the worldâs most expensive caviar. This Beluga caviar is white in appearance. The most expensive caviar comes from the Beluga Sturgeon, native to the Caspian Sea. Generally, the lighter the color of Beluga caviar the older the fish is.