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It differs from cyanocobalamin in that the cyano group at the cobalt is replaced with a methyl group. [1] Methylcobalamin features an octahedral cobalt(III) centre and can be obtained as bright red crystals. [2] From the perspective of coordination chemistry, methylcobalamin is notable as a rare example of a compound that contains metal–alkyl ...
"B12" and "Cbl" redirect here. For other uses of B12, see B12 (disambiguation). For the musical group, see Carbon Based Lifeforms. Pharmaceutical compound Vitamin B12 General skeletal formula of cobalamins Stick model of cyanocobalamin (R = CN) based on the crystal structure Clinical data Other names Vitamin B12, vitamin B-12, cobalamin AHFS / Drugs.com Monograph MedlinePlus a605007 License ...
The structure of vitamin B 12 was the first low-molecular weight natural product determined by x-ray analysis rather than by chemical degradation. Thus, while the structure of this novel type of complex biomolecule was established, its chemistry remained essentially unknown; exploration of this chemistry became one of the tasks of the vitamin's chemical synthesis.
For example, cyanocobalamin can be converted to its analog cobalamins via reduction to B 12s, followed by the addition of the corresponding alkyl halides, acyl halides, alkene or alkyne. Steric hindrance is the major limiting factor in the synthesis of the B 12 coenzyme analogs. For example, no reaction occurs between neopentyl chloride and B
Cyanocobalamin (Artificial B12) Index of chemical compounds with the same molecular formula This set index page lists chemical structure articles associated with the same molecular formula .
The C-terminal region of the product of the MMACHC gene is similar to TonB, a bacterial protein involved in energy transduction for cobalamin uptake. [5] The MMACHC gene product catalyzes the decyanation of cyanocobalamin as well as the dealkylation of alkylcobalamins including methylcobalamin and adenosylcobalamin. [6]
Vitamin B 12 deficiency; Other names: Hypocobalaminemia, cobalamin deficiency: Image of the cervical spinal cord in vitamin B 12 deficiency showing subacute combined degeneration. . (A) The midsagittal T2 weighted image shows linear hyperintensity in the posterior portion of the cervical tract of the spinal cord (black arrow
Adenosylcobalamin (AdoCbl), also known as coenzyme B 12, cobamamide, and dibencozide, is one of the biologically active forms of vitamin B 12. [1]Schematic diagram of the propionate metabolic pathway.