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  2. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8] Vitamin B 12 deficiency is a widespread condition that is particularly prevalent in populations with low ...

  3. Vitamin B12 total synthesis - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_total_synthesis

    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.

  4. Cobalamin biosynthesis - Wikipedia

    en.wikipedia.org/wiki/Cobalamin_biosynthesis

    Cobalamin biosynthesis is the process by which bacteria and archea make cobalamin, vitamin B 12. Many steps are involved in converting aminolevulinic acid via uroporphyrinogen III and adenosylcobyric acid to the final forms in which it is used by enzymes in both the producing organisms and other species, including humans who acquire it through ...

  5. B vitamins - Wikipedia

    en.wikipedia.org/wiki/B_vitamins

    Dietary supplements containing all eight are referred to as a vitamin B complex. Individual B vitamins are referred to by B-number or by chemical name, such as B 1 for thiamine , B 2 for riboflavin , and B 3 for niacin , [ 1 ] [ 2 ] while some are more commonly recognized by name than by number, such as pantothenic acid (B 5 ), biotin (B 7 ...

  6. Corrin - Wikipedia

    en.wikipedia.org/wiki/Corrin

    In vitamin B 12, the resulting complex also features a benzimidazole-derived ligand, and the sixth site on the octahedron serves as the catalytic center. The corrin ring resembles the porphyrin ring. [2] Both feature four pyrrole-like subunits organized into rings.

  7. Vitamin B12 Is a Power Nutrient. Here's How to Know If ... - AOL

    www.aol.com/vitamin-b12-power-nutrient-heres...

    Lack of vitamin B12 can cause megaloblastic anemia—a condition characterized by larger than normal red blood cells in a smaller than normal amount. This causes fatigue, paleness in the skin ...

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