It contains a tetrapyrrole ring system called a corrin ring.
It contains a tetrapyrrole ring system called a corrin ring. Contained within the corrin ring at the coordination point is the element that gives this compound its alternate name, and it is associated with a cyanide ion and a dimethylbenzimidazole nucleotide. One of its forms functions as a coenzyme in the oxidation of fatty acids, and in the presence of folic acid it works to produce the amino acid methionine, though its general function is to methylate compounds. A shortage of intrinsic factor prevents the absorption of this vitamin, which causes pernicious anemia. FTP, identify this B-complex vitamin, also known as cyanocobalamin, found only in animal sources.
It contains a tetrapyrrole ring system called a corrin ring.
vitamin {B12} (accept {cyanocobalamin} on early buzz)