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These materials are provided for laboratory investigation and scientific experimentation and are not supplied for use in humans or animals
Leonard, H
[127] [128] Synthesis [edit] Biosynthesis [edit] Vitamin B 12 is derived from a tetrapyrrolic structural framework created by the enzymes deaminase and cosynthetase which transform aminolevulinic acid via porphobilinogen and hydroxymethylbilane to uroporphyrinogen III
Yang CJ, Han RY, Wang SS
(PubMed) Spence JD, Yi Q, Hankey GJ
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