Intrinsic factor (IF), or gastric intrinsic factor (GIF), is a glycoprotein. It is produced by the parietal cells of the stomach.
IF is necessary for the absorption of vitamin B12 (cobalamin) later on in the ileum of the small intestine. In humans, the gastric intrinsic factor protein is encoded by the GIF gene.
A: Intrinsic factor is a glycoprotein that is necessary for the absorption of vitamin B12 in the small intestine.
A: Intrinsic factor is produced by the parietal cells of the stomach.
A: The specific function of intrinsic factor is to ensure the absorption of vitamin B12 in the small intestine.
A: Vitamin B12 is important for the metabolism of cells, DNA synthesis, and the proper functioning of the nervous system.
A: The GIF gene is the gene that encodes the gastric intrinsic factor protein in humans.
A: A deficiency of intrinsic factor can lead to vitamin B12 deficiency anemia.
A: No, the body cannot produce vitamin B12 without intrinsic factor.
