Coenzyme B12 (adenosylcobalamin; AdoCbl) is a biologically active form of vitamin B12 (Item No. 18425). It belongs to the corrinoid group of compounds, which contain a corrin macrocycle, and is produced only by certain bacteria and archaea. It is a cofactor for various enzymes including mutases, eliminases, aminomutases, and a reductase.2 These enzymes catalyze reactions that generate free radicals through release of the adenosyl group, allowing usually unreactive molecules to become reactive. Only one of these enzymes, methylmalonyl CoA mutase, is found in mammals, therefore, the other enzymes must be taken in through the diet. Genetic mutations in enzymes that synthesize AdoCbl lead to AdoCbl deficiency and methylmalonic aciduria.3 Formulations containing AdoCbl are used to treat patients with this disorder.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.