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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.
Vitamin B 12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins.It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
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 ...
In humans, consumption of cobalt-containing vitamin B 12 meets all needs for cobalt. For cattle and sheep, which meet vitamin B 12 needs via synthesis by resident bacteria in the rumen, there is a function for inorganic cobalt.
In molecular biology, the vitamin B12-binding domain is a protein domain which binds to cobalamin (vitamin B12). It can bind two different forms of the cobalamin cofactor, with cobalt bonded either to a methyl group (methylcobalamin) or to 5'-deoxyadenosine (adenosylcobalamin).
Vitamin B12 can be found in multivitamins, B-complex supplements, and by itself in a B12 supplement, which are available in many natural and synthetic forms including cyanocobalamin and ...
“Vitamin B12 requirements are low because we can store up to 2,500 micrograms in the liver,” says Ryan D. Andrews, R.D., C.S.C.S., principal nutritionist at Precision Nutrition. So target just ...
Albert Jakob Eschenmoser (5 August 1925 – 14 July 2023) was a Swiss organic chemist, best known for his work on the synthesis of complex heterocyclic natural compounds, most notably vitamin B 12. In addition to his significant contributions to the field of organic synthesis, Eschenmoser pioneered work in the Origins of Life (OoL) field with ...
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