Pepsinogen I is secreted by chief cells, and pepsinogen II is secreted by pyloric glands. The secretion of pepsinogen is stimulated by vagal stimulation, gastrin, and histamine. Pepsinogen I is mainly found in the body of the stomach, where most acid is secreted. Pepsin is a proteolytic enzyme, whereas pepsinogen is a proenzyme. â¢ Pepsin is the active form of pepsinogen while pepsinogen is the inactive precursor of pepsin. â¢ Unlike the pepsin, pepsinogen is secreted by chief cells and pyloric glands.
A reefer ship is a refrigerated cargo ship; a type of ship typically used to transport perishable commodities which require temperature-controlled transportation, such as fruit, meat, fish, vegetables, dairy products and other foods.
It operates 19 heavy lift transport ships, the world's largest such fleet. The MV Blue Marlin is the crown jewel among that armada. At 738-feet long, with a gross tonnage of 56,000 metric tons, and a deck larger than two American football fields, it's the largest semi-submersible ship on Earth. The Blue Marlin is outfitted with 38 cabins, accommodates 60 people, and even features a workout room, sauna and swimming facilities.