Intrinsic factor (IF), also known as gastric intrinsic factor (GIF), is a glycoprotein produced by the parietal cells of the stomach.It is necessary for the absorption of vitamin B12 (cobalamin) later on in the small intestine. In humans, the gastric intrinsic factor protein is encoded by the GIF gene.Haptocorrin (also known as HC, R protein, and transcobalamin I, TCN1), is a glycoprotein secreted by the salivary glands which binds to vitamin B 12.he intrinsic factor is secreted by the stomach. It is present in the gastric juice as well as in the gastric mucous membrane. The optimum pH for its action is 7 and it is inactivated at temperatures above 45 Â°C.
The snow leopard or ounce (Panthera uncia syn. Uncia uncia) is a large cat native to the mountain ranges of Central and South Asia. It is listed as Endangered on the IUCN Red List of Threatened Species because, as of 2003, the size of the global wild population was estimated at 4,080â6,590 adults.
Opiliones are arachnids, but not spiders. They have no venom glands at all, and are absolutely not venomous. The nickname daddy longlegs may also refer to a crane fly, which is a true fly and a member of the order Diptera.Crane flies do not pose a threat, either.Sometimes, the name daddy longlegs is used for another group of arachnids, the spiders of the family Pholcidae. These spiders are also commonly called cellar spiders. Cellar spiders do have venom glands.However, there is no scientific evidence whatsoever to confirm that their venom can harm a human being.rane flies do not pose a threat, either. Sometimes, the name daddy longlegs is used for another group of arachnids, the spiders of the family Pholcidae. These spiders are also commonly called cellar spiders.