Gourt > Health > Nutrition > Nutrients > Vitamins and Minerals > Cobalamin
| Cyanocobalamin | |
|---|---|
| General | |
| Molecular formula | C63H88CoN14O14P |
| Molar mass | 1355.37 g/mol |
| Chemical infobox source * (all but the picture) | |
Pseudo-B refers to B-like substances which are found in certain organisms, such as Spirulina spp. (blue-green algae, cyanobacteria). However, these substances do not have B biological activity for humans.
Structure
B is the most chemically complex of all the vitamins. B's structure is based on a corrin ring, which, although similar to the porphyrin ring found in heme, chlorophyll, and cytochrome, has two of the pyrrole rings directly bonded. The central metal ion is Co (cobalt). Four of the six coordinations are provided by the corrin ring nitrogens, and a fifth by a dimethylbenzimidazole group. The sixth coordination partner varies, being a cyano group (-CN), a hydroxyl group (-OH), a methyl group (-CH3) or a 5'-deoxyadenosyl group (here the C5' atom of the deoxyribose forms the covalent bond with Co), respectively, to yield the four B forms mentioned above. The covalent C-Co bond is the only carbon-metal bond known in biology. More on [ Cyanocobalamin ]
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