Abstract
A WIDE range of cobalamins exist where the cyano group of the original vitamin B12 is replaced, for example, by water (vitamin B12b), halides, nitrite, sulphur-containing groups, and alkyl groups (the coenzymes and analogues) and the nature of the ligand attached to the cobalt has a profound influence on the chemical and physical properties of the cobalamin.
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DOLPHIN, D., JOHNSON, A. & SHAW, N. Sulphitocobalamin. Nature 199, 170–171 (1963). https://doi.org/10.1038/199170b0
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DOI: https://doi.org/10.1038/199170b0
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